Change Windows 2008 R2 64bit product key

Sometimes it ins necessary to change the product key from Windows 2008 R2. To do that this is quite simple

Run the following commands (from a CMD [Run as Administrator]):

1.) This parameter clears KMS entry:

Slmgr.vbs /ckms

2.) This parameter removes product key installed:

Slmgr.vbs /upk

3.) This parameter sets the new key:

slmgr.vbs /ipk xxxx-xxxx-xxxx-xxxx

Once changed, you need to activate Windows 2008 again via the System Panel!

Cross reference:

• KMS Client Setup Keys