Windows Version Numbers

Each Microsoft Windows operating system has a familiar name, like Windows 10 or Windows Vista, but behind each common name is an actual Windows version number¹.

Windows Version Numbers

Below is a list of major Windows versions and their associated version numbers:

Operating System	Version Details	Version Number
Windows 10	Windows 10 (1703)	10.0.15063
	Windows 10 (1607)	10.0.14393
	Windows 10 (1511)	10.0.10586
	Windows 10	10.0.10240
Windows 8	Windows 8.1 (Update 1)	6.3.9600
	Windows 8.1	6.3.9200
	Windows 8	6.2.9200
Windows 7	Windows 7 SP1	6.1.7601
	Windows 7	6.1.7600
Windows Vista	Windows Vista SP2	6.0.6002
	Windows Vista SP1	6.0.6001
	Windows Vista	6.0.6000
Windows XP	Windows XP2	5.1.26003

_{[1] More specific than a version number, at least in Windows, is a build number, often indicating exactly what major update or service pack has been applied to that Windows version. This is the last number shown in the version number column, like 7600 for Windows 7. Some sources note the build number in parenthesis, like 6.1 (7600).}

_{[2] Windows XP Professional 64-bit had its own version number of 5.2. As far as I know, that's the only time Microsoft has designated a special version number for a specific edition and architecture-type of a Windows operating system.}

_{[3] Service pack updates to Windows XP did update the build number, but in a very minor and long-winded way. For example, Windows XP with SP3 and other small updates is listed as having a version number of 5.1 (Build 2600.xpsp_sp3_qfe.130704-0421 : Service Pack 3).}