Windows XP, released by Microsoft in 2001 ^[1], marked a significant milestone in the evolution of the Windows operating system. Known for its stability and user-friendly interface, XP brought together the consumer-oriented Windows 9x series and the business-oriented Windows NT/2000. It introduced a redesigned graphical user interface and improved hardware support. Windows XP quickly gained widespread adoption, becoming one of the most popular and enduring Windows versions.^[2] Its support continued for over a decade, with Microsoft releasing multiple service packs to enhance security and functionality. However, by April 2014, Microsoft officially ended support for Windows XP, urging users to upgrade to more modern operating systems.^[3]

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Released in 2007, Windows Vista was designed to be a significant upgrade over Windows XP, introducing a new visual style called Aero, enhanced security features, and improved system performance. However, Vista faced criticism for its high system requirements, compatibility issues with existing software and hardware, and initial stability problems. Despite its challenges, Vista laid the groundwork for future Windows versions by introducing features such as User Account Control (UAC) for improved security. Over time, Microsoft addressed many of the initial concerns through service packs and updates. Ultimately, Windows Vista's mixed reception led to it being overshadowed by its successor, Windows 7, which quicly gained widespread acceptance among users.

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Launched in 2009, Windows 7 aimed to address the criticisms of Windows Vista and provide a more polished and user-friendly experience. It introduced a refined taskbar, improved performance, and enhanced compatibility with both software and hardware. Windows 7 received positive reviews for its stability and usability, quickly becoming a favorite among users. Its success was highlighted by its widespread adoption across both personal and business environments. Microsoft provided continuous support and updates for Windows 7 until January 2020, marking an impressive 11 year lifespan for the operating system.

[1]: Stories, Microsoft, 24 Aug. 2001, An inside Look at the Months-Long Process of Getting Windows XP Ready for Release to Manufacturing.
[2]: StatCounter Global Stats, StatCounter Global Stats, 21 Jan. 2024, "Desktop Windows Version Market Share Worldwide".
[3]: Microsoft Lifecycle | Microsoft Learn, Accessed 21 Jan. 2024. “Search Product and Services Lifecycle Information - Microsoft Lifecycle.”