You're lucky Rick, fucking MS is always accusing me of running a pirated version even when it is one I bought from the store.. assholes. Change any equipment (HDD, MB, CPU, etc) and the installed Windows sends a message to Microsoft that it's in "another" machine. You are then guilty until you can prove yourself innocent, which is a royal PITA.
There is a URL you can buy full downloadable versions of windows with keys for about $59 for win7 Ultimate. You won't know you're buying from China unless you look at your credit card and see the transaction being changed from dollars into Remimbe :rolf: They do work though