Overview

Windows is Microsoft's long-running family of operating systems for personal computers and related devices. It began as a graphical operating environment for MS-DOS and became a full operating-system platform through successive releases. The first retail version, Windows 1.0, appeared in 1985, introducing a graphical interface, overlapping application windows, menus, dialog boxes, and support for peripherals that were difficult to manage through command-line software alone. Early Windows versions were closely tied to MS-DOS, but the brand gradually evolved into Microsoft's primary platform for consumer computing, business productivity, software development, gaming, education, and device management. The product's importance grew sharply during the expansion of the IBM-compatible PC market. Windows 3.0 and Windows 3.1 established a broad software ecosystem, while Windows 95 combined the graphical shell with major changes to the underlying platform and introduced interface conventions such as the Start menu and taskbar. Microsoft used aggressive distribution, partnerships with computer manufacturers, and extensive consumer marketing to make Windows a standard component of new PCs. Windows 98 extended the platform's support for emerging internet and multimedia use, and Windows 2000 strengthened its enterprise and professional positioning. Windows XP, released in 2001, unified Microsoft's consumer and business product lines around the Windows NT architecture. Its long service life and broad hardware and software compatibility made it one of the most influential Windows releases. Windows Vista introduced a redesigned visual system, stronger security controls, and new hardware requirements, but its reception was mixed. Microsoft responded with Windows 7, which emphasized performance, compatibility, usability, and improvements informed by customer feedback. Windows 8 then attempted a more radical, touch-oriented redesign for PCs and tablets, including a full-screen Start experience and a new application model. The changes were commercially and critically controversial, leading to Windows 8.1 and a more familiar interface in Windows 10. Windows 10, launched in 2015, was presented as a cross-device platform rather than merely a desktop upgrade. It restored a hybrid Start menu, introduced Microsoft Edge, expanded integrated services such as Cortana, and supported a universal application strategy spanning PCs and other Microsoft platforms. Microsoft initially described it as a shift toward Windows delivered as an ongoing service, with regular feature and security updates rather than a simple sequence of isolated releases. The company later introduced Windows 11 in 2021 with updated visual design, centered taskbar and Start elements, new window-management features, Microsoft Teams integration, a redesigned Microsoft Store, and greater emphasis on security and modern hardware capabilities. Today, Windows remains a major platform for laptops, desktops, workstations, gaming PCs, enterprise environments, schools, developers, and specialized systems. Windows 11 is the principal current client product, while Windows Server serves infrastructure and server workloads. The wider Windows ecosystem includes built-in security, accessibility tools, cloud-connected services, developer frameworks, gaming technologies, and support for applications distributed through traditional installers, the Microsoft Store, and third-party channels. Microsoft has also promoted AI-assisted features in Windows 11, although availability varies by device, region, edition, and hardware. Windows competes with macOS, Linux distributions, ChromeOS, Android, and other specialized operating systems. Its enduring position rests on installed-base effects, OEM distribution, compatibility with legacy software, enterprise management capabilities, and a large developer and hardware ecosystem.

History

Windows originated as Microsoft's attempt to make personal computing more approachable through a graphical environment layered over MS-DOS. Windows 1.0, released in 1985, provided a visual workspace for applications and utilities, but it did not immediately displace command-line computing. The platform gained momentum through improvements in memory management, graphics, application support, and hardware compatibility. Windows 3.0 in 1990 and Windows 3.1 in 1992 made the environment substantially more practical for mainstream users and helped Microsoft establish a large independent software ecosystem. The 1995 launch of Windows 95 was a decisive brand and product moment. It combined a more capable operating environment with a redesigned interface centered on the Start menu, taskbar, desktop, and long-file-name support. Microsoft marketed the release on an unusually large scale and benefited from the rapid growth of the IBM-compatible PC industry. Windows 98 further connected the platform to internet use and consumer multimedia, while Windows Millennium Edition represented the final major consumer branch built on the older Windows 9x lineage. In parallel, Microsoft developed the Windows NT family for professional and enterprise workloads. Windows NT introduced a more robust architecture, stronger security and multitasking foundations, and a design intended for workstations and servers. Windows 2000 and Windows XP brought the NT architecture to a broader audience. Windows XP, released in 2001, consolidated consumer and business lines and became a durable platform because of its broad compatibility, familiar interface, and long support period. Windows Server continued as a related but separately positioned product family for organizational infrastructure. Windows Vista, released in 2006, introduced the Aero visual system, expanded security controls such as User Account Control, indexing and search improvements, and a new driver and hardware model. Its higher system requirements, compatibility problems, and performance concerns produced a difficult market reception. Windows 7, released in 2009, was positioned as a more polished and responsive successor. Microsoft emphasized usability, compatibility, taskbar improvements, device support, and feedback from the existing PC community. The release restored confidence in the client platform and remained widely deployed for years. Windows 8, released in 2012, reflected Microsoft's effort to respond to touch computing, tablets, and changing consumer-device patterns. It introduced a tile-based Start screen, a touch-oriented application model, and a more unified experience across different device categories. Many desktop users objected to the removal of a familiar Start workflow and to the tension between traditional desktop software and the new interface. Windows 8.1 adjusted several of these choices, but the episode influenced Microsoft's subsequent product and marketing decisions. Windows 10 arrived in 2015 with a hybrid interface, the return of a conventional Start menu, Microsoft Edge, broader integration of Microsoft services, and an approach based on continuing updates. Microsoft presented the release as a common foundation across PCs and other device categories. Windows 10 also marked a stronger attempt to connect the Windows brand with productivity, creativity, gaming, security, and personal experiences rather than treating it solely as a technical operating-system product. Windows 11 was announced and released in 2021. It introduced a redesigned visual language, centered Start and taskbar layouts, Snap window arrangements, a refreshed Microsoft Store, and hardware and security requirements that excluded some older PCs. Microsoft has continued to develop Windows 11 through feature updates and has increasingly incorporated cloud-connected and AI-assisted capabilities. Windows remains central to Microsoft's client software business and is supported by an ecosystem that includes PC manufacturers, application developers, enterprise administrators, game publishers, accessibility communities, and users of specialized and embedded devices.

2021
Windows 11 released
[3]Windows 11 official product pagemicrosoft.com
Windows 11 brought a visual redesign, new window-management features, a refreshed Store, and stricter hardware and security requirements.
2015
Windows 10 released
[6]How Windows 10 reveals a more emotive side to Microsoft's marketingmarketingweek.com
Windows 10 restored a hybrid Start experience and introduced Microsoft's ongoing-update approach for the client platform.
2012
Windows 8 launched
[4]Windows 8 advertising campaign goes globalblogs.windows.com
Windows 8 introduced a touch-oriented interface and application model for PCs and tablets.
2009
Windows 7 released
[2]Microsoft company historymicrosoft.com
Windows 7 focused on performance, compatibility, usability, and refinements following the mixed reception of Windows Vista.
2001
Windows XP unified consumer and business lines
[2]Microsoft company historymicrosoft.com
Windows XP brought the Windows NT architecture to Microsoft's mainstream client platform and became one of the most widely used Windows releases.
1995
Windows 95 launched
[2]Microsoft company historymicrosoft.com
Windows 95 introduced the Start menu and taskbar and became a major consumer milestone during the expansion of the IBM-compatible PC market.
1990
Windows 3.0 expanded mainstream adoption
[2]Microsoft company historymicrosoft.com
Windows 3.0 improved graphics, memory handling, and application support, helping establish Windows as a mainstream PC software platform.
1985
Windows 1.0 released
[2]Microsoft company historymicrosoft.com
Microsoft released the first retail version of Windows as a graphical environment designed to run with MS-DOS.

Products and positioning

A broadly compatible operating-system platform for personal computing, work, education, gaming, enterprise administration, and connected digital experiences.

Desktop operating system · 2021
Windows 11
The current principal client release in the Windows family. Windows 11 combines a redesigned interface with Snap layouts, updated system security requirements, an overhauled Microsoft Store, accessibility features, gaming support, and cloud-connected services. Microsoft has continued adding productivity, security, and AI-assisted capabilities through feature updates. Availability and functionality vary by edition, device hardware, market, and account configuration.
Desktop operating system · 2015
Windows 10
Released in 2015, Windows 10 restored a familiar desktop workflow while retaining elements of Microsoft's cross-device strategy. It introduced Microsoft Edge, a hybrid Start menu, expanded integration with Microsoft services, and an update model centered on continuing servicing. Windows 10 became a major enterprise and consumer platform before Microsoft shifted its principal client focus to Windows 11.
Server operating system
Windows Server
The server-oriented branch of Windows supports organizational infrastructure, identity and directory services, file and application workloads, virtualization, administration, and hybrid connections with Microsoft's cloud ecosystem. It is positioned separately from the consumer Windows client and is released through editions and servicing models intended for business and institutional deployments.
Embedded and specialized operating system
Windows IoT
Windows IoT products adapt Windows technologies for embedded, industrial, commercial, and specialized devices. They are used where managed hardware, long-term servicing, device security, and compatibility with Windows software or administration tools are important. The family includes editions with different capabilities and deployment targets.

Marketing campaigns

2021Windows 11 launch campaign
United States · Global
Microsoft launched Windows 11 advertising with a visually imaginative and deliberately calming presentation. The campaign sought to communicate the redesigned operating system as an inviting environment for work, creativity, and everyday computing.
Outcome. The campaign introduced the new Windows 11 visual identity and supported the product's staged rollout to eligible devices.
Source
2015The Future Starts Now
Global
Windows 10 advertising emphasized what people could accomplish with the operating system rather than concentrating only on specifications. Creative themes included future possibilities, security, reduced dependence on passwords, Microsoft Edge, and a more connected experience across devices.
Outcome. The campaign supported Microsoft's broader move toward more human-centered and emotionally expressive consumer marketing.
Source
2012Windows 8: Reimagined
Global
Microsoft promoted Windows 8 as a fundamental rethinking of the Windows experience. The global campaign used music, local creative adaptations, television, outdoor advertising, digital media, and retail activity, while also supporting the launch of Surface and Windows 8 PCs and tablets.
Outcome. The campaign gave Windows 8 substantial global visibility, although the product's touch-oriented interface generated controversy among traditional desktop users.
Source
2009The Billion Designers of Windows 7
United States · United Kingdom · France · Germany · Japan · Australia
The campaign framed Windows 7 as a product shaped by the feedback and ideas of PC users. It responded directly to the reputational problems associated with Vista and used the message that the user community had helped design the successor. Advertising appeared across television, print, online, outdoor, and branded-entertainment channels.
Outcome. The campaign reinforced Windows 7's positioning as a responsive and user-informed improvement over Vista.
Source

Brand decisions

2021
Microsoft launched Windows 11 with stricter hardware requirementsGeneration change
Background
Microsoft positioned the new release around modern security, updated hardware capabilities, and a redesigned user experience.
Action taken
Windows 11 introduced a refreshed interface, Snap layouts, an updated Store, and requirements including supported processors and security hardware for eligible installations.
Aftermath
The requirements created a more clearly bounded supported-device base and generated discussion among users with otherwise functional older PCs.
Source
2015
Windows shifted toward ongoing servicingStrategy
Background
Microsoft sought to reduce the disruption associated with major operating-system upgrades and to make Windows a continuously updated platform.
Action taken
Windows 10 was delivered with regular feature and security updates and marketed as a common platform spanning multiple device categories.
Aftermath
The servicing model became a defining part of Windows distribution and later informed the way Windows 11 was delivered.
Source
2012
Microsoft adopted a touch-oriented Windows designGeneration change
Background
The growth of smartphones and tablets led Microsoft to reconsider the traditional desktop interface and seek a more unified experience across PCs and touch devices.
Action taken
Windows 8 introduced a full-screen Start experience, tile-based interface, and a new application model designed for touch as well as conventional computers.
Aftermath
The redesign received a mixed response, particularly from desktop users, and Microsoft subsequently adjusted the experience in Windows 8.1 and Windows 10.
Source

Recent events

Unconfirmed
Microsoft blocks affected eMudhra CA keys[9]微软封锁受影响的 eMudhra CA 金钥ithome.com.tw
Microsoft blocked eight affected CA keys through the Windows Disallowed CTL and updated Edge and WebView2 CRLSet components to block TLS certificates issued by the affected CAs.
2026.10.29
Reported2026.10.29
Microsoft reports fiscal Q1 2027 results[10]微软公布2027财年第一季度业绩theverge.com
Microsoft reported $92.3 billion in revenue and $33.6 billion in net income for its fiscal first quarter of 2027. The results also showed growth in cloud revenue and declines in Windows and Xbox revenue.
Unconfirmed
Reported2026.10.29
Windows sponsors the short film “Mama Bear”[11]Windows 赞助短片《Mama Bear》theverge.com
The description for Curry Barker’s short film “Mama Bear” thanks Windows for sponsoring the film.
2026.10.08
Reported2026.10.08
Microsoft begins testing redesigned Windows Search for Windows 11[12]微软开始测试重新设计的 Windows 11 搜索功能theverge.com
Microsoft has put a significantly redesigned Windows Search into testing with Windows Insiders. Built on WinUI 3, the new experience is faster with inline previews for files and answers, better typo and synonym matching, and launcher-style actions including phone tasks via Phone Link, with a rollout to Windows 11 expected in the coming months.
2021.08.03
Reported2021.08.03
Microsoft announces Windows 365 subscription prices[13]微软公布Windows 365订阅价格gsmarena.com
Microsoft released official pricing for Windows 365 Business and Enterprise, enabling business and enterprise customers to start using the service. Listed monthly prices vary by virtual machine configuration, and the Business Hybrid Benefit can reduce the price for eligible customers.
2021.08.02
Reported2021.08.03
Microsoft launches Windows 365 for general availability[14]Microsoft面向公众推出Windows 365itnewsafrica.com
Microsoft launched its Windows 365 Cloud PC desktop-as-a-service product for general availability on 2 August 2021.
2021.07.14
Reported2021.07.14
Microsoft announced the planned launch of Windows 365[15]微软宣布计划推出Windows 365prnasia.com
Microsoft announced Windows 365, a cloud service providing the Windows operating system, and said it would launch on August 2. The launch was planned, not yet completed in the report.
2021.06.24
Reported2021.06.25
Microsoft releases Windows 11[16]微软正式发布Windows 11notebook.it168.com
Microsoft released the Windows 11 operating system and announced that eligible Windows 10 users would be able to upgrade for free, beginning in the fall.
2021.06.03
Reported2021.06.03
Microsoft announces June 24 Windows update event[17]微软宣布将于6月24日推出新版Windowsfinance.sina.com.cn
Microsoft announced that it would unveil a new version of Windows on June 24; the article also says an online event was scheduled for that date.
2021.02.02
Reported2021.02.02
Microsoft releases Windows 10 Build 21301.1010 update[18]微软发布 Windows 10 Build 21301.1010 更新finance.sina.com.cn
Microsoft released cumulative update KB5000626 for Windows Insider users in the Dev channel, raising Windows 10 to Build 21301.1010. The report says the update contains no new content and is mainly for testing the servicing pipeline.