only thing is many certs don't know how to really do the myriad reinstalls to match the key...it can be a nightmare, lol
I recently did a rebuild of one of my HPs who's recovery partition evidently had a corrupted file. I turned in on and noticed one of those recovered segments in there and deleted it. Needless to say, the HP recovery did not work because it halted at one file...it installed fine, but not on reboot.
So I created a WinXP install, and got it to work with this computers legit key...I think that is key...no pun intended.