I have a Windows 7 x64 RTM cd key. I know that you can install them on 10 computers total, 3 per month. My question is how do you un-register a key, say if I want to move that install to a new computer without using up another of those 10 installs? Is there a tool that can tell me where each key is installed, and any other information about it? Also, I got the Key from Technet (do not have an account no longer). If I give this key out to a friend, or family member, and call Microsoft for help, am I legal/legit? Do these keys last for ever? Or do they expect this keys only to be used for business alone. I know that is the base reason for the technet rtm keys, but.