Solve : window xp to window 7?

1.	Solve : window xp to window 7?
Answer» I just upgrade it my pc from window xp to window 7 and my pc doesn't start up and not EVEN in safe mode, I changed the boot to start from cd drive and then from hard disk and not responding and the pc run for hours with window start. Now I can't even downgrade to xp ANYMORE as it not running the from cd.Before installing W7 did you check the Windows Upgrade Advisor and HARDWARE COMPATIBILITY?

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