How to change your Windows 2008 product key

Ok, here we go:

Do the following.

1. Open the command prompt and change working directory to System32 directory
2. Type in slmgr.vbs -ckms (this clears and KMS entry if you have one)
3. Type slmgr.vbs -upk (this removes any product key installed)
4. Type slmgr.vbs -ipk xxxxx-xxxxx-xxxxx-xxxxx-xxxxx (where the x’s is the new product key you want to use )
5. Type slmgr.vbs -ato (this activates the server)

after doing that, Windows Server 2008 should show up as activated.