The easiest way to do this is with the following command: Vista: slmgr.vbs -skms _servers_FQDN Windows 7:<br />slmgr.vbs /skms _servers_FQDN Note 1: You should run this with elevated administrator permissions. Note 2: This does not actually activate the computer. Activation will happen within about 2 hours automatically, or you can run the following command: Vista: slmgr.vbs -ato Windows 7: slmgr.vbs /ato** – Main.FredPettis - 2010-08-14