Can I run Windows NT Server 4.0, Windows 2000 Server, Windows Server 2003, or Windows Server 2003 R2 as one of the four virtual instances granted in Windows Server 2008 Enterprise?
A. Yes. You may run earlier versions of the Windows Server operating system, but not later versions, by exercising your downgrade rights in the software license terms. You will need to use your existing media to run Windows NT Server 4.0, Windows 2000 Server, Windows Server 2003, or Windows Server 2003 R2.