If you want to be very specific in your OS version in a comment, I think this list covers all relevant ones:

Windows 95 Retail 4.00.950
Windows 95 Retail SP1 4.00.950A
Windows 95 OSR1 4.00.950A
Windows 95 OSR2 4.00.950B
Windows 95 OSR2.1 4.00.950B
Windows 95 OSR2.5 4.00.950C
Windows 98 4.10.1998
Windows 98 SE 4.10.2222
Windows ME 4.90.3000
Windows NT 4.0 SP6a
Windows 2000 Professional SP4
Windows 2000 Server SP4
Windows XP Home Edition
Windows XP Professional
Windows XP Professional SP1
Windows XP Professional SP1a
Windows XP Professional SP2
Windows XP 64-bit Edition 2003
Windows XP Professional x64 Edition
Windows Server 2003
Windows Server 2003 SP1
Windows Server 2003 SP2
Windows Server 2003 R2
Windows Server 2003 R2 SP2
Windows Server 2003 x64 Edition
Windows XP Professional x64 Edition SP2
Windows Server 2003 x64 Edition SP2
Windows Vista Home Basic
Windows Vista Home Premium
Windows Vista Business
Windows Vista Enterprise
Windows Vista Ultimate

Any others?