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Comparison of Microsoft Windows versions. Microsoft Windows is the name of several families of computer software operating systems created by Microsoft. Microsoft first introduced an operating environment named Windows in November 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces (GUIs).
Windows 7, a major release of the Microsoft Windows operating system, has been released in several editions since its original release in 2009. Only Home Premium, Professional, and Ultimate were widely available at retailers. [ 1 ] The other editions focus on other markets, such as the software development world or enterprise use.
e. Windows 7 is a major release of the Windows NT operating system developed by Microsoft. It was released to manufacturing on July 22, 2009, and became generally available on October 22, 2009. [ 10 ] It is the successor to Windows Vista, released nearly three years earlier.
At the time of launch, Microsoft deemed Windows 7 (with Service Pack 1) and Windows 8.1 users eligible to upgrade to Windows 10 free of charge, so long as the upgrade took place within one year of Windows 10's initial release date. Windows RT and the respective Enterprise editions of Windows 7, 8, and 8.1 were excluded from this offer.
On April 25, 2005, Microsoft released Windows XP Professional x64 Edition and Windows Server 2003 x64 editions to support x86-64 (or simply x64), the 64-bit version of x86 architecture. Windows Vista was the first client version of Windows NT to be released simultaneously in IA-32 and x64 editions. As of 2024, x64 is still supported.
Windows XP. Microsoft Windows XP Professional x64 Edition is an edition of Windows XP for x86-64 personal computers. It was released on April 25, 2005, around the same time as with the x86-64 versions of Windows Server 2003. It is designed to use the expanded 64-bit memory address space provided by the x86-64 architecture.
A "personal computer" version of Windows is considered to be a version that end-users or OEMs can install on personal computers, including desktop computers, laptops, and workstations. The first five versions of Windows– Windows 1.0, Windows 2.0, Windows 2.1, Windows 3.0, and Windows 3.1 –were all based on MS-DOS, and were aimed at both ...
In 2003, 64-bit CPUs were introduced to the mainstream PC market in the form of x86-64 processors and the PowerPC G5 . A 64-bit register can hold any of 2 64 (over 18 quintillion or 1.8×10 19) different values. The range of integer values that can be stored in 64 bits depends on the integer representation used.
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