Disadvantages Of Windows Operating System

There are no disadvantages to an operating system, being that without an operating system, a computer would not be able to function, at least where it would be any more than a series of static pictures. Linux Operating System: It is an operating system assembled under the model of open source software development and mostly used for server purpose. It supports many programming languages like C,C,JAVA,PHP and many more. Disadvantages of Linux. While there are perfectly passable alternatives to many popular Windows programs (such as the various Office components), some high-end applications such as Photoshop don’t have as close equivalents in Linux. Fans of PC gaming may find Linux offers them a much more limited range. Android is a mobile operating system owned and developed by Google. The main advantages of Android are that it is an open source operating system so almost anyone can create apps for it. Disadvantages: There is no GUI. (excluding DOSSHELL and other 3rd party GUI's). Interface on a base install is command line only. Since BG declered that 'DOS is dead' we have to put uo with his propoganda why we should upgrade to Windows XP because 'DOS is dead'. Fast and smooth software and hardware: Another advantage of Chrome OS is that it is a light operating system that requires less hardware resources unlike OS X and Windows. It does not need high-powered processors and memory and large storage space. Windows OS much more advanced than Windows and Linux have able to install softwares, games etc quick menu- a quicket and easier way to find the applications 7 layer OSI Model Mac OS Easy to use, especially for new PC users with plenty of help easy to upgrade from each version of.

• Advantage Of Windows
• Windows Os Advantages And Disadvantages
• Disadvantages Of Microsoft Windows
• Advantages And Disadvantages Of Windows 10 Operating System
• Operating System Advantages And Disadvant…
• Advantages And Disadvantages Of Windows Xp Operating System

2017 was a turning point for fans of Windows Phone and the ecosystem of Microsoft applications in general. Microsoft Corporation officially recognized the death of its mobile OS, after which development companies no longer provided further support for the platform. The corporation had to admit that their smartphones did not bring it any profit. In recent years, a market share of Windows Phone has been steadily declining, and now it has almost reached the bottom — 0.1%.

On the Internet, it was rumored that the software giant would release windows 10 for android, but so far, this idea is implemented only in the form of pre-installed proprietary software on devices of other popular manufacturers.

Some history first

Immediately after its emergence in 2009, Windows Phone managed to occupy a solid market share of almost 10%. At that point, Symbian dominated mobile market, which was the OS, first Nokia smartphones operated on. It occupied more than 50% of the market. The second largest player was the mobile OC RIM of the then-popular Blackberry manufacturer (20.9%). Android back then only tried to find its market occupying only about 4%.

Microsoft today

As you may know, with the change of leadership in 2014, Microsoft’s affairs went uphill. Satya Nadella, the company’s new leader, has proclaimed a fresh strategy, which lies in offering cross-platform software. Thus, Microsoft went beyond their OS, and most of the company’s services immigrated to the operating system of the key competitor. Of course, we are talking about Android here.

Currently, Microsoft itself personally advises using its applications on Android and iOS platforms. Of course, app analogs from Microsoft cannot replace the entire ecosystem of Android, but they can make the user experience less painful. Speaking of things that can make your life less painful when it comes to studies, you may want to check out EduBirdie if you need some help with writing your term paper.

Now, let us talk about the windows phone pros and cons.

Advantages

Performance

The experience of users using microsoft phone shows that their devices still work fast though it depends on the particular device and whether it is a flagship or not. The smoothness of the interface, the speed of running apps, switching between open windows, performing other operations occur just fine.

Security

The Microsoft operating system is still the most secure compared to Android or IOS. This has something to do with the source code and a reliable system of protection.

Disadvantages

Lack of demand

Microsoft’s smartphones have almost disappeared from the market and continue to lose their positions. This is largely due to the lack of new flagship devices, significant updates to the OS and little attention to Microsoft’s own platform: often the company prefers to support iOS or Android, releasing updates or even new applications for the competing platforms, and only later for Windows 10 Mobile. In addition, Microsoft says almost nothing about its plans to return to the mobile market.

No updates

In January 2018, Microsoft announced that it would no longer release test updates for the windows 10 mobile os. Previously, the company admitted that the platform would no longer receive new features and the autumn update of Fall Creators Update would become the last major update for smartphones running on the OS.

Windows 10 Mobile, conceived as a full-fledged OS for mobile devices and having the functions of “converting” smartphones using a docking station, monitor, and keyboard into a working PC, has long received no major updates. One of the latest devices on this platform was the HP Elite X3 mobile phone, announced in February 2016.

No more push notifications

The software giant stopped supporting mobile push notifications for smartphones running on OS 7.5 and OS 8.0. The is due to the fact that the support period for older operating systems has come to an end. For Windows Phone 8.1, push notifications will still work, but this is unlikely to last.

In conclusion, it is safe to say that Windows Phone is dead as of 2018 and those users who still have windows mobile phone should consider selling it.

Microsoft Windows is a group of several graphicaloperating system families, all of which are developed, marketed and sold by Microsoft. Each family caters to a certain sector of the computing industry. Active Microsoft Windows families include Windows NT and Windows IoT; these may encompass subfamilies, e.g. Windows Server or Windows Embedded Compact (Windows CE). Defunct Microsoft Windows families include Windows 9x, Windows Mobile and Windows Phone.

Microsoft introduced an operating environment named Windows on November 20, 1985, as a graphical operating system shell for MS-DOS in response to the growing interest in graphical user interfaces (GUIs).^[3] Microsoft Windows came to dominate the world's personal computer (PC) market with over 90% market share, overtaking Mac OS, which had been introduced in 1984. Apple came to see Windows as an unfair encroachment on their innovation in GUI development as implemented on products such as the Lisa and Macintosh (eventually settled in court in Microsoft's favor in 1993). On PCs, Windows is still the most popular operating system. However, in 2014, Microsoft admitted losing the majority of the overall operating system market to Android,^[4] because of the massive growth in sales of Android smartphones. In 2014, the number of Windows devices sold was less than 25% that of Android devices sold. This comparison however may not be fully relevant, as the two operating systems traditionally target different platforms. Still, numbers for server use of Windows (that are comparable to competitors) show one third market share, similar to that for end user use.

As of October 2018, the most recent version of Windows for PCs, tablets, smartphones and embedded devices is Windows 10. The most recent version for server computers is Windows Server, version 1903.^[5]A specialized version of Windows also runs on the Xbox Onevideo game console.^[6]

• 1Genealogy
• 2Version history
  • 2.4Windows NT
• 5Usage share and device sales
• 6Security

Genealogy

By marketing role

Microsoft, the developer of Windows, has registered several trademarks, each of which denote a family of Windows operating systems that target a specific sector of the computing industry. As of 2014, the following Windows families were being actively developed:

• Windows NT: Started as a family of operating systems with Windows NT 3.1, an operating system for server computers and workstations. It now consists of three operating system subfamilies that are released almost at the same time and share the same kernel:
  • Windows: The operating system for mainstream personal computers, tablets and smartphones. The latest version is Windows 10. The main competitor of this family is macOS by Apple for personal computers and Android for mobile devices (c.f. Usage share of operating systems § Market share by category).
  • Windows Server: The operating system for server computers. The latest version is Windows Server 2019. Unlike its client sibling, it has adopted a strong naming scheme. The main competitor of this family is Linux. (c.f. Usage share of operating systems § Market share by category)
  • Windows PE: A lightweight version of its Windows sibling, meant to operate as a live operating system, used for installing Windows on bare-metal computers (especially on many computers at once), recovery or troubleshooting purposes. The latest version is Windows PE 10.
• Windows IoT (previously Windows Embedded): Initially, Microsoft developed Windows CE as a general-purpose operating system for every device that was too resource-limited to be called a full-fledged computer. Eventually, however, Windows CE was renamed Windows Embedded Compact and was folded under Windows Compact trademark which also consists of Windows Embedded Industry, Windows Embedded Professional, Windows Embedded Standard, Windows Embedded Handheld and Windows Embedded Automotive.^[7]

The following Windows families are no longer being developed:

Advantage Of Windows

• Windows 9x: An operating system that targeted consumers market. Discontinued because of suboptimal performance.^{[citation needed]} (PC World called its last version, Windows Me, one of the worst products of all time.^[8]) Microsoft now caters to the consumer market with Windows NT.
• Windows Mobile: The predecessor to Windows Phone, it was a mobile phone operating system. The first version was called Pocket PC 2000; the third version, Windows Mobile 2003 is the first version to adopt the Windows Mobile trademark. The last version is Windows Mobile 6.5.
• Windows Phone: An operating system sold only to manufacturers of smartphones. The first version was Windows Phone 7, followed by Windows Phone 8, and the last version Windows Phone 8.1. It was succeeded by Windows 10 Mobile.

Version history

The term Windows collectively describes any or all of several generations of Microsoftoperating system products. These products are generally categorized as follows:

Early versions

The history of Windows dates back to 1981, when Microsoft started work on a program called 'Interface Manager'. It was announced in November 1983 (after the Apple Lisa, but before the Macintosh) under the name 'Windows', but Windows 1.0 was not released until November 1985.^[9] Windows 1.0 was to compete with Apple's operating system, but achieved little popularity. Windows 1.0 is not a complete operating system; rather, it extends MS-DOS. The shell of Windows 1.0 is a program known as the MS-DOS Executive. Components included Calculator, Calendar, Cardfile, Clipboard viewer, Clock, Control Panel, Notepad, Paint, Reversi, Terminal and Write. Windows 1.0 does not allow overlapping windows. Instead all windows are tiled. Only modal dialog boxes may appear over other windows. Microsoft sold as included Windows Development libraries with the C development environment, which included numerous windows samples.^[10]

Windows 2.0 was released in December 1987, and was more popular than its predecessor. It features several improvements to the user interface and memory management.^[11] Windows 2.03 changed the OS from tiled windows to overlapping windows. The result of this change led to Apple Computer filing a suit against Microsoft alleging infringement on Apple's copyrights.^[12][13] Windows 2.0 also introduced more sophisticated keyboard shortcuts and could make use of expanded memory.

Windows 2.1 was released in two different versions: Windows/286 and Windows/386. Windows/386 uses the virtual 8086 mode of the Intel 80386 to multitask several DOS programs and the paged memory model to emulate expanded memory using available extended memory. Windows/286, in spite of its name, runs on both Intel 8086 and Intel 80286 processors. It runs in real mode but can make use of the high memory area.^{[citation needed]}

In addition to full Windows-packages, there were runtime-only versions that shipped with early Windows software from third parties and made it possible to run their Windows software on MS-DOS and without the full Windows feature set.

The early versions of Windows are often thought of as graphical shells, mostly because they ran on top of MS-DOS and use it for file system services.^[14] However, even the earliest Windows versions already assumed many typical operating system functions; notably, having their own executable file format and providing their own device drivers (timer, graphics, printer, mouse, keyboard and sound). Unlike MS-DOS, Windows allowed users to execute multiple graphical applications at the same time, through cooperative multitasking. Windows implemented an elaborate, segment-based, software virtual memory scheme, which allows it to run applications larger than available memory: code segments and resources are swapped in and thrown away when memory became scarce; data segments moved in memory when a given application had relinquished processor control.

Windows 3.x

Windows 3.0, released in 1990, improved the design, mostly because of virtual memory and loadable virtual device drivers (VxDs) that allow Windows to share arbitrary devices between multi-tasked DOS applications.^{[citation needed]} Windows 3.0 applications can run in protected mode, which gives them access to several megabytes of memory without the obligation to participate in the software virtual memory scheme. They run inside the same address space, where the segmented memory provides a degree of protection. Windows 3.0 also featured improvements to the user interface. Microsoft rewrote critical operations from C into assembly. Windows 3.0 is the first Microsoft Windows version to achieve broad commercial success, selling 2 million copies in the first six months.^[15][16]

Windows 3.1, made generally available on March 1, 1992, featured a facelift. In August 1993, Windows for Workgroups, a special version with integrated peer-to-peer networking features and a version number of 3.11, was released. It was sold along with Windows 3.1. Support for Windows 3.1 ended on December 31, 2001.^[17]

Windows 3.2, released 1994, is an updated version of the Chinese version of Windows 3.1.^[18] The update was limited to this language version, as it fixed only issues related to the complex writing system of the Chinese language.^[19] Windows 3.2 was generally sold by computer manufacturers with a ten-disk version of MS-DOS that also had Simplified Chinese characters in basic output and some translated utilities.

Windows 9x

The next major consumer-oriented release of Windows, Windows 95, was released on August 24, 1995. While still remaining MS-DOS-based, Windows 95 introduced support for native 32-bit applications, plug and play hardware, preemptive multitasking, long file names of up to 255 characters, and provided increased stability over its predecessors. Windows 95 also introduced a redesigned, object oriented user interface, replacing the previous Program Manager with the Start menu, taskbar, and Windows Explorershell. Windows 95 was a major commercial success for Microsoft; Ina Fried of CNET remarked that 'by the time Windows 95 was finally ushered off the market in 2001, it had become a fixture on computer desktops around the world.'^[20] Microsoft published four OEM Service Releases (OSR) of Windows 95, each of which was roughly equivalent to a service pack. The first OSR of Windows 95 was also the first version of Windows to be bundled with Microsoft's web browser, Internet Explorer.^[21] Mainstream support for Windows 95 ended on December 31, 2000, and extended support for Windows 95 ended on December 31, 2001.^[22]

Windows 95 was followed up with the release of Windows 98 on June 25, 1998, which introduced the Windows Driver Model, support for USB composite devices, support for ACPI, hibernation, and support for multi-monitor configurations. Windows 98 also included integration with Internet Explorer 4 through Active Desktop and other aspects of the Windows Desktop Update (a series of enhancements to the Explorer shell which were also made available for Windows 95). In May 1999, Microsoft released Windows 98 Second Edition, an updated version of Windows 98. Windows 98 SE added Internet Explorer 5.0 and Windows Media Player 6.2 amongst other upgrades. Mainstream support for Windows 98 ended on June 30, 2002, and extended support for Windows 98 ended on July 11, 2006.^[23]

On September 14, 2000, Microsoft released Windows Me (Millennium Edition), the last DOS-based version of Windows. Windows Me incorporated visual interface enhancements from its Windows NT-based counterpart Windows 2000, had faster boot times than previous versions (which however, required the removal of the ability to access a real mode DOS environment, removing compatibility with some older programs),^[24] expanded multimedia functionality (including Windows Media Player 7, Windows Movie Maker, and the Windows Image Acquisition framework for retrieving images from scanners and digital cameras), additional system utilities such as System File Protection and System Restore, and updated home networking tools.^[25] However, Windows Me was faced with criticism for its speed and instability, along with hardware compatibility issues and its removal of real mode DOS support. PC World considered Windows Me to be one of the worst operating systems Microsoft had ever released, and the 4th worst tech product of all time.^[8]

Windows NT

Early versions

In November 1988, a new development team within Microsoft (which included former Digital Equipment Corporation developers Dave Cutler and Mark Lucovsky) began work on a revamped version of IBM and Microsoft's OS/2 operating system known as 'NT OS/2'. NT OS/2 was intended to be a secure, multi-user operating system with POSIX compatibility and a modular, portablekernel with preemptive multitasking and support for multiple processor architectures. However, following the successful release of Windows 3.0, the NT development team decided to rework the project to use an extended 32-bit port of the Windows API known as Win32 instead of those of OS/2. Win32 maintained a similar structure to the Windows APIs (allowing existing Windows applications to easily be ported to the platform), but also supported the capabilities of the existing NT kernel. Following its approval by Microsoft's staff, development continued on what was now Windows NT, the first 32-bit version of Windows. However, IBM objected to the changes, and ultimately continued OS/2 development on its own.^[26][27]

The first release of the resulting operating system, Windows NT 3.1 (named to associate it with Windows 3.1) was released in July 1993, with versions for desktop workstations and servers. Windows NT 3.5 was released in September 1994, focusing on performance improvements and support for Novell's NetWare, and was followed up by Windows NT 3.51 in May 1995, which included additional improvements and support for the PowerPC architecture. Windows NT 4.0 was released in June 1996, introducing the redesigned interface of Windows 95 to the NT series. On February 17, 2000, Microsoft released Windows 2000, a successor to NT 4.0. The Windows NT name was dropped at this point in order to put a greater focus on the Windows brand.^[27]

Windows XP

The next major version of Windows NT, Windows XP, was released on October 25, 2001. The introduction of Windows XP aimed to unify the consumer-oriented Windows 9x series with the architecture introduced by Windows NT, a change which Microsoft promised would provide better performance over its DOS-based predecessors. Windows XP would also introduce a redesigned user interface (including an updated Start menu and a 'task-oriented' Windows Explorer), streamlined multimedia and networking features, Internet Explorer 6, integration with Microsoft's .NET Passport services, modes to help provide compatibility with software designed for previous versions of Windows, and Remote Assistance functionality.^[28]

At retail, Windows XP was now marketed in two main editions: the 'Home' edition was targeted towards consumers, while the 'Professional' edition was targeted towards business environments and power users, and included additional security and networking features. Home and Professional were later accompanied by the 'Media Center' edition (designed for home theater PCs, with an emphasis on support for DVD playback, TV tuner cards, DVR functionality, and remote controls), and the 'Tablet PC' edition (designed for mobile devices meeting its specifications for a tablet computer, with support for stylus pen input and additional pen-enabled applications).^[29][30][31] Mainstream support for Windows XP ended on April 14, 2009. Extended support ended on April 8, 2014.^[32]

After Windows 2000, Microsoft also changed its release schedules for server operating systems; the server counterpart of Windows XP, Windows Server 2003, was released in April 2003.^[27] It was followed in December 2005, by Windows Server 2003 R2.

Windows Vista

After a lengthy development process, Windows Vista was released on November 30, 2006, for volume licensing and January 30, 2007, for consumers. It contained a number of new features, from a redesigned shell and user interface to significant technical changes, with a particular focus on security features. It was available in a number of different editions, and has been subject to some criticism, such as drop of performance, longer boot time, criticism of new UAC, and stricter license agreement. Vista's server counterpart, Windows Server 2008 was released in early 2008.

Windows 7

On July 22, 2009, Windows 7 and Windows Server 2008 R2 were released as RTM (release to manufacturing) while the former was released to the public 3 months later on October 22, 2009. Unlike its predecessor, Windows Vista, which introduced a large number of new features, Windows 7 was intended to be a more focused, incremental upgrade to the Windows line, with the goal of being compatible with applications and hardware with which Windows Vista was already compatible.^[33] Windows 7 has multi-touch support, a redesigned Windows shell with an updated taskbar, a home networking system called HomeGroup,^[34] and performance improvements.

Windows 8 and 8.1

Windows 8, the successor to Windows 7, was released generally on October 26, 2012. A number of significant changes were made on Windows 8, including the introduction of a user interface based around Microsoft's Metro design language with optimizations for touch-based devices such as tablets and all-in-one PCs. These changes include the Start screen, which uses large tiles that are more convenient for touch interactions and allow for the display of continually updated information, and a new class of apps which are designed primarily for use on touch-based devices. The new Windows version required a minimum resolution of 1024×768 pixels,^[35] effectively making it unfit for netbooks with 800x600-pixel screens.

Other changes include increased integration with cloud services and other online platforms (such as social networks and Microsoft's own OneDrive (formerly SkyDrive) and Xbox Live services), the Windows Store service for software distribution, and a new variant known as Windows RT for use on devices that utilize the ARM architecture.^{[36][37][38][39][40][41]} An update to Windows 8, called Windows 8.1,^[42] was released on October 17, 2013, and includes features such as new live tile sizes, deeper OneDrive integration, and many other revisions. Windows 8 and Windows 8.1 have been subject to some criticism, such as removal of the Start menu.

Windows 10

On September 30, 2014, Microsoft announced Windows 10 as the successor to Windows 8.1. It was released on July 29, 2015, and addresses shortcomings in the user interface first introduced with Windows 8. Changes on PC include the return of the Start Menu, a virtual desktop system, and the ability to run Windows Store apps within windows on the desktop rather than in full-screen mode. Windows 10 is said to be available to update from qualified Windows 7 with SP1, Windows 8.1 and Windows Phone 8.1 devices from the Get Windows 10 Application (for Windows 7, Windows 8.1) or Windows Update (Windows 7).^[43]

In February 2017, Microsoft announced the migration of its Windows source code repository from Perforce to Git. This migration involved 3.5 million separate files in a 300 gigabyte repository.^[44] By May 2017, 90 percent of its engineering team was using Git, in about 8500 commits and 1760 Windows builds per day.^[44]

Multilingual support

Multilingual support is built into Windows since Windows 3. The language for both the keyboard and the interface can be changed through the Region and Language Control Panel. Components for all supported input languages, such as Input Method Editors, are automatically installed during Windows installation (in Windows XP and earlier, files for East Asian languages, such as Chinese, and right-to-left scripts, such as Arabic, may need to be installed separately, also from the said Control Panel). Third-party IMEs may also be installed if a user feels that the provided one is insufficient for their needs.

Interface languages for the operating system are free for download, but some languages are limited to certain editions of Windows. Language Interface Packs (LIPs) are redistributable and may be downloaded from Microsoft's Download Center and installed for any edition of Windows (XP or later) – they translate most, but not all, of the Windows interface, and require a certain base language (the language which Windows originally shipped with). This is used for most languages in emerging markets. Full Language Packs, which translates the complete operating system, are only available for specific editions of Windows (Ultimate and Enterprise editions of Windows Vista and 7, and all editions of Windows 8, 8.1 and RT except Single Language). They do not require a specific base language, and are commonly used for more popular languages such as French or Chinese. These languages cannot be downloaded through the Download Center, but available as optional updates through the Windows Update service (except Windows 8).

Windows Os Advantages And Disadvantages

The interface language of installed applications are not affected by changes in the Windows interface language. Availability of languages depends on the application developers themselves.

Windows 8 and Windows Server 2012 introduces a new Language Control Panel where both the interface and input languages can be simultaneously changed, and language packs, regardless of type, can be downloaded from a central location. The PC Settings app in Windows 8.1 and Windows Server 2012 R2 also includes a counterpart settings page for this. Changing the interface language also changes the language of preinstalled Windows Store apps (such as Mail, Maps and News) and certain other Microsoft-developed apps (such as Remote Desktop). The above limitations for language packs are however still in effect, except that full language packs can be installed for any edition except Single Language, which caters to emerging markets.

Platform support

Windows NT included support for several different platforms before the x86-based personal computer became dominant in the professional world. Windows NT 4.0 and its predecessors supported PowerPC, DEC Alpha and MIPS R4000. (Although some these platforms implement 64-bit computing, the operating system treated them as 32-bit.) However, Windows 2000, the successor of Windows NT 4.0, dropped support for all platforms except the third generation x86 (known as IA-32) or newer in 32-bit mode. The client line of Windows NT family still runs on IA-32, although the Windows Server line has ceased supporting this platform with the release of Windows Server 2008 R2.

With the introduction of the Intel Itanium architecture (IA-64), Microsoft released new versions of Windows to support it. Itanium versions of Windows XP and Windows Server 2003 were released at the same time as their mainstream x86 counterparts. Windows XP 64-Bit Edition, released in 2005, is the last Windows client operating systems to support Itanium. Windows Server line continues to support this platform until Windows Server 2012; Windows Server 2008 R2 is the last Windows operating system to support Itanium architecture.

On April 25, 2005, Microsoft released Windows XP Professional x64 Edition and Windows Server 2003 x64 Editions to support the x86-64 (or simply x64), the eighth generation of x86 architecture. Windows Vista was the first client version of Windows NT to be released simultaneously in IA-32 and x64 editions. x64 is still supported.

An edition of Windows 8 known as Windows RT was specifically created for computers with ARM architecture and while ARM is still used for Windows smartphones with Windows 10, tablets with Windows RT will not be updated. Starting from Windows 10 Fall Creators Update and later includes support for PCs with ARM architecture.^[45]

Windows CE

Windows CE (officially known as Windows Embedded Compact), is an edition of Windows that runs on minimalistic computers, like satellite navigation systems and some mobile phones. Windows Embedded Compact is based on its own dedicated kernel, dubbed Windows CE kernel. Microsoft licenses Windows CE to OEMs and device makers. The OEMs and device makers can modify and create their own user interfaces and experiences, while Windows CE provides the technical foundation to do so.

Windows CE was used in the Dreamcast along with Sega's own proprietary OS for the console. Windows CE was the core from which Windows Mobile was derived. Its successor, Windows Phone 7, was based on components from both Windows CE 6.0 R3 and Windows CE 7.0. Windows Phone 8 however, is based on the same NT-kernel as Windows 8.

Windows Embedded Compact is not to be confused with Windows XP Embedded or Windows NT 4.0 Embedded, modular editions of Windows based on Windows NT kernel.

Xbox OS

Disadvantages Of Microsoft Windows

Xbox OS is an unofficial name given to the version of Windows that runs on the Xbox One.^[46] It is a more specific implementation with an emphasis on virtualization (using Hyper-V) as it is three operating systems running at once, consisting of the core operating system, a second implemented for games and a more Windows-like environment for applications.^[47]Microsoft updates Xbox One's OS every month, and these updates can be downloaded from the Xbox Live service to the Xbox and subsequently installed, or by using offline recovery images downloaded via a PC.^[48] The Windows 10-based Core had replaced the Windows 8-based one in this update, and the new system is sometimes referred to as 'Windows 10 on Xbox One' or 'OneCore'.^[49][50]Xbox One's system also allows backward compatibility with Xbox 360,^[51] and the Xbox 360's system is backwards compatible with the original Xbox.^[52]

Version control system

In 2017 Microsoft announced that it would start using Git, an open source version control system created by Linus Torvalds. Microsoft has previously used a proprietary version control system called 'Source Depot'. Microsoft had begun to integrate Git into Team Foundation Server in 2013, but Windows continued to rely on Source Depot. Because of its large, decades-long history, the Windows codebase is not especially well suited to the decentralized nature of Linux development that Git was originally created to manage. Each Git repository contains a complete history of all the files, which proved unworkable for Windows developers because cloning the repository takes several hours. Microsoft has been working on a new project called the Virtual File System for Git (VFSForGit) to address these challenges.^[53]

Timeline of releases

Usage share and device sales

According to Net Applications, which tracks the use of operating systems in devices that are active on the Web, Windows was the most used operating-system family on personal computers in July 2017, with close to 90% usage share.^[59] Including personal computers of all kinds (e.g., desktops, laptops, mobile devices), Windows OSes accounted for 35.24% of usage share in July 2017, compared to Android (highest, at 41.24%), iOS's 13.22%, and macOS's 4.64%, according to StatCounter, which tracks use of operating systems by their use in devices active on the Web.^[60][61] Windows is used in less than half the market not only in developing countries, but also in developed ones—such as the United States, where use of Windows on desktops, on which it is the plurality operating system, has fallen to 46.18%,^[62] and the United Kingdom and Ireland. These numbers are easiest (monthly numbers) to find that track real use, but they may not mirror installed base or sales numbers (in recent years) of devices. They are consistent with server numbers in next section.

In terms of the number of devices shipped with the operating system installed, on smartphones, Windows Phone was the third-most-shipped OS (2.6%) after Android (82.8%) and iOS (13.9%) in the second quarter of 2015 according to IDC.^[63] Across both PCs and mobile devices, in 2014, Windows OSes were the second-most-shipped (333 million devices, or 14%) after Android (1.2 billion, 49%) and ahead of iOS and macOS combined (263 million, 11%).^[64]

Use of the latest version Windows 10 has exceeded Windows 7 globally since early 2018.^[65] In most developed countries, such as Japan, Australia and the US, Windows 10 already was the most popular version since early 2017.^[66]

Usage share on servers

Advantages And Disadvantages Of Windows 10 Operating System

Usage share of Windows on servers – those running a web servers that is (there are also other kinds of servers) – is at 33.6%.^[67]

Security

Consumer versions of Windows were originally designed for ease-of-use on a single-user PC without a network connection, and did not have security features built in from the outset.^[68] However, Windows NT and its successors are designed for security (including on a network) and multi-user PCs, but were not initially designed with Internet security in mind as much, since, when it was first developed in the early 1990s, Internet use was less prevalent.^[69]

These design issues combined with programming errors (e.g. buffer overflows) and the popularity of Windows means that it is a frequent target of computer worm and virus writers. In June 2005, Bruce Schneier's Counterpane Internet Security reported that it had seen over 1,000 new viruses and worms in the previous six months.^[70] In 2005, Kaspersky Lab found around 11,000 malicious programs—viruses, Trojans, back-doors, and exploits written for Windows.^[71]

Microsoft releases security patches through its Windows Update service approximately once a month (usually the second Tuesday of the month), although critical updates are made available at shorter intervals when necessary.^[72] In versions of Windows after and including Windows 2000 SP3 and Windows XP, updates can be automatically downloaded and installed if the user selects to do so. As a result, Service Pack 2 for Windows XP, as well as Service Pack 1 for Windows Server 2003, were installed by users more quickly than it otherwise might have been.^[73]

While the Windows 9x series offered the option of having profiles for multiple users, they had no concept of access privileges, and did not allow concurrent access; and so were not true multi-user operating systems. In addition, they implemented only partial memory protection. They were accordingly widely criticised for lack of security.

The Windows NT series of operating systems, by contrast, are true multi-user, and implement absolute memory protection. However, a lot of the advantages of being a true multi-user operating system were nullified by the fact that, prior to Windows Vista, the first user account created during the setup process was an administrator account, which was also the default for new accounts. Though Windows XP did have limited accounts, the majority of home users did not change to an account type with fewer rights – partially due to the number of programs which unnecessarily required administrator rights – and so most home users ran as administrator all the time.

Windows Vista changes this^[74] by introducing a privilege elevation system called User Account Control. When logging in as a standard user, a logon session is created and a token containing only the most basic privileges is assigned. In this way, the new logon session is incapable of making changes that would affect the entire system. When logging in as a user in the Administrators group, two separate tokens are assigned. The first token contains all privileges typically awarded to an administrator, and the second is a restricted token similar to what a standard user would receive. User applications, including the Windows shell, are then started with the restricted token, resulting in a reduced privilege environment even under an Administrator account. When an application requests higher privileges or 'Run as administrator' is clicked, UAC will prompt for confirmation and, if consent is given (including administrator credentials if the account requesting the elevation is not a member of the administrators group), start the process using the unrestricted token.^[75]

Leaked documents published by WikiLeaks, codenamed Vault 7 and dated from 2013–2016, detail the capabilities of the CIA to perform electronic surveillance and cyber warfare,^[76] such as the ability to compromise operating systems such as Microsoft Windows.^[77]

In August 2019, computer experts reported that the BlueKeepsecurity vulnerability, CVE-2019-0708, that potentially affects older unpatched Microsoft Windows versions via the program's Remote Desktop Protocol, allowing for the possibility of remote code execution, may now include related flaws, collectively named DejaBlue, affecting newer Windows versions (i.e., Windows 7 and all recent versions) as well.^[78] In addition, experts reported a Microsoftsecurity vulnerability, CVE-2019-1162, based on legacy code involving Microsoft CTF and ctfmon (ctfmon.exe), that affects all Windows versions from the older Windows XP version to the most recent Windows 10 versions; a patch to correct the flaw is currently available.^[79]

File permissions

All Windows versions from Windows NT 3 have been based on a file system permission system referred to as AGDLP (Accounts, Global, Local, Permissions) in which file permissions are applied to the file/folder in the form of a 'local group' which then has other 'global groups' as members. These global groups then hold other groups or users depending on different Windows versions used. This system varies from other vendor products such as Linux and NetWare due to the 'static' allocation of permission being applied directory to the file or folder. However using this process of AGLP/AGDLP/AGUDLP allows a small number of static permissions to be applied and allows for easy changes to the account groups without reapplying the file permissions on the files and folders.

Windows Defender

On January 6, 2005, Microsoft released a Beta version of Microsoft AntiSpyware, based upon the previously released Giant AntiSpyware. On February 14, 2006, Microsoft AntiSpyware became Windows Defender with the release of Beta 2. Windows Defender is a freeware program designed to protect against spyware and other unwanted software. Windows XP and Windows Server 2003 users who have genuine copies of Microsoft Windows can freely download the program from Microsoft's web site, and Windows Defender ships as part of Windows Vista and 7.^[80] In Windows 8, Windows Defender and Microsoft Security Essentials have been combined into a single program, named Windows Defender. It is based on Microsoft Security Essentials, borrowing its features and user interface. Although it is enabled by default, it can be turned off to use another anti-virus solution.^[81]Windows Malicious Software Removal Tool and the optional Microsoft Safety Scanner are two other free security products offered by Microsoft. In the Windows 10 Anniversary Update, Microsoft introduced the Limited Periodic Scanning feature, which allows Windows Defender to scan, detect, and remove any threats that third-party anti-virus software missed. The Advanced Threat Protection service is introduced for enterprise users. The new service uses cloud service to detect and take actions on advanced network attacks.

Third-party analysis

In an article based on a report by Symantec,^[82] internetnews.com has described Microsoft Windows as having the 'fewest number of patches and the shortest average patch development time of the five operating systems it monitored in the last six months of 2006.'^[83]

A study conducted by Kevin Mitnick and marketing communications firm Avantgarde in 2004, found that an unprotected and unpatched Windows XP system with Service Pack 1 lasted only four minutes on the Internet before it was compromised, and an unprotected and also unpatched Windows Server 2003 system was compromised after being connected to the internet for 8 hours.^[84] The computer that was running Windows XP Service Pack 2 was not compromised. The AOL National Cyber Security Alliance Online Safety Study of October 2004, determined that 80% of Windows users were infected by at least one spyware/adware product.^{[citation needed]} Much documentation is available describing how to increase the security of Microsoft Windows products. Typical suggestions include deploying Microsoft Windows behind a hardware or software firewall, running anti-virus and anti-spyware software, and installing patches as they become available through Windows Update.^[85]

Alternative implementations

Owing to the operating system's popularity, a number of applications have been released that aim to provide compatibility with Windows applications, either as a compatibility layer for another operating system, or as a standalone system that can run software written for Windows out of the box. These include:

• Wine – a free and open-source implementation of the Windows API, allowing one to run many Windows applications on x86-based platforms, including UNIX, Linux and macOS. Wine developers refer to it as a 'compatibility layer'^[86] and use Windows-style APIs to emulate Windows environment.
  • CrossOver – a Wine package with licensed fonts. Its developers are regular contributors to Wine, and focus on Wine running officially supported applications.
  • Cedega – a proprietary fork of Wine by TransGaming Technologies, designed specifically for running Microsoft Windows games on Linux. A version of Cedega known as Cider allows Windows games to run on macOS. Since Wine was licensed under the LGPL, Cedega has been unable to port the improvements made to Wine to their proprietary codebase. Cedega ceased its service in February 2011.
  • Darwine – a port of Wine for macOS and Darwin. Operates by running Wine on QEMU.
  • Linux Unified Kernel – a set of patches to the Linux kernel allowing many Windows executable files in Linux (using Wine DLLs); and some Windows drivers to be used.
• ReactOS – an open-source OS intended to run the same software as Windows, originally designed to simulate Windows NT 4.0, now aiming at Windows 7 compatibility. It has been in the development stage since 1996.
• Linspire – formerly LindowsOS, a commercial Linux distribution initially created with the goal of running major Windows software. Changed its name to Linspire after Microsoft v. Lindows. Discontinued in favor of Xandros Desktop, that was also later discontinued.
• Freedows OS – an open-source attempt at creating a Windows clone for x86 platforms, intended to be released under the GNU General Public License. Started in 1996, by Reece K. Sellin, the project was never completed, getting only to the stage of design discussions which featured a number of novel concepts until it was suspended in 2002.^[87][88][89]

See also

• Azure Sphere, Microsoft's Linux-based operations system
• Windows Subsystem for Linux, a subsystem in Windows 10, not using the Linux kernel; reimplementing

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External links

• Pearson Education, InformIT – History of Microsoft Windows

Advantages And Disadvantages Of Windows Xp Operating System