Hello. A friend of mine have a pc with invalid windows 7 installtion (I get a message that that I may be a victim and so on...). I have a real original windows 7 pro copy that is still new and wasn't registered yet. Can I register the bad copy with the key of the good one so it will be legal and she want need to reinstall windows 7 (because then she will need to install all the other programs she already install on it). Thanks.