as some of you may know, i short circuited my motherboard.... (fool i know). I have windows xp on the hard drive. To install the motherboard i'll have to reinstall windows. Everything (except from some more ram, and an added cd- drive) is the same form when i first installed windows, but will windows refuse my activation code on the grounds it's 'another pc' because it will have a new motherboard and processor?
If you have changed major components especially the motherboard and processor (plus the other things you mention) you present Microsoft with what appears to be a vastly different PC to the one registered earlier. Somewhere in your help file you shgpould be able to find a telephone number for Microsoft where you can inform them of your actions. You may need some proof of identity! Good luck.