[humanpuff69]

If your provider offers a Windows 2008 template then your own Windows 8 key will work. But it won't work for other templates. Also remember Windows 2008 server and Widows 2008 Desktop are different. Can't use the same serial key for both. I think you have a Windows 2008 Desktop key since it's not often people by server keys.

no it wouldnt . windows 2008 is a server version of windows vista and windows 8 is windows 8 . even though you have windows vista and windows 8 key you cannot use it to activate windows vista because it totally have different key . the only thing that i know to enter another os key is when windows 10 offer free upgrade and you can insert windows 7 , 8 and 8.1 key and your windows 10 will be activate

and there are no windows 2008 desktop . the closest thing to 2008 desktop is windows vista . which they end the support for it recently and windows vista have low reputation for being laggy and unstable . and also lot of incompatibility