Re: Windows xp will NOT start
No legimate way, I'm afraid.
You can call Micro$oft and have them reactivate your key so you can reinstall the copy and link it to another motherboard. However, they would not reactivate your copy if you told them you needed to put it on a different computer.
However, if you told them that you just had to replace the motherboard in your machine because the old one broke, they would be cool with that. As long as it was in the same machine...
... too bad that isn't the case...