Windows NT is a family of operating systems produced by Microsoft, the first version of which was released on July 27, 1993. It is a processor-independent, multiprocessing and multi-user operating system. The first version of Windows NT was Windows NT 3.1 and was produced for workstations and server computers. The build number is an internal identifier used by Microsoft's.
Drop into a command prompt and issue either of the following commands; systeminfo findstr OS Or winver You can then use this table to determine the version; Which shows: Operating system Version number Windows 8.1 6.3* Windows Server 2012 R2 6.3* Windows 8 6.2 Windows Server 2012 6.2 Windows 7 6.1 Windows Server 2008 R2 6.1 Windows Server 2008 6.0 Windows Vista 6.0 Windows Server 2003 R2 5.2 Windows Server 2003 5.2 Windows XP 64-Bit Edition 5.2 Windows XP 5.1 Windows 2000 5.0 Based on your comment, it would appear you're running Windows Server 2012 as opposed to Windows Server 2012 R2. Oxmetrics 7 download hd.