Originally Posted by udrongo
Yeah, but you can get away with installing Windows on more than one machine if you so desire. It requires an unreasonable number of uses of the key code to cause problems. Using it more legal purposes, how else could you reformat and do a clean install on the same machine?
Luckily, I have obtained multiple free (legal) licences from school and other sources so I personally don't worry about it.
You are allowed 3 initial registrations of Windows XP Professional before you have to call MS to get the registration ok'd.
And when you "acquire" a copy that does not require you to register (that is what comes with my MSDN Subscription at work) then you have recieved a volume license copy. That CD Key will be allowed to link up and recieve updates even if it's been registered 10,000 times. However microsoft sometimes catches on and disables they key. I'm more inclined to say that they follow where each cd key ends up and will probably come a knocking some day...