This isn’t a big step by step guide for something, just a quick one liner for anyone to find the version of Windows in Windows XP, Windows Vista, Windows Server 2003 & Windows Server 2008.
Winver is the command that one can run to find the version of Windows.
1. Click Start – RUN (In Windows Vista/Server 2008, Start – Search RUN), type “winver” and press enter.
This should show the “About Windows” with Windows Version and Build.
Windows Version in Windows Vista
Windows Version in Windows Server 2008
Hope this comes handy!!!