I'm sure this has been brought up before, but here goes anyway... I'm installing a new MB/CPU in my computer this weekend. I own Windows XP Pro retail, and I've installed new MB's before, and everytime, I have to call in to activate, and I just tell them my old MB crapped out, and I had to install a new one. Is there a limit to how many times I can do this? I truly only have it installed on this one 'computer'. I'm keeping the same VC, memory, HD's and OD's... Thanks.