Hey guys. Today I restarted my computer because it was kinda running slow. Then after the bios loaded I get the windows logon sound "dun dun dun dun" and then I get a message saying my hardware has changed significantly. It then says I have 3 days to reactivate windows. So I try and reactivate it only for it to say that my product key has been used the maximum number of times. My parents bought this about 5 or 6 years ago (Windows XP Home Edition) and our product key is on the side of the computer. But it keeps saying it's been used too many times. Wtf? Can anyone help?