My computer won´t start. It powers up but no beeps. Have checked all connections, etc., and even replaced power unit, but no joy. Next step is to move the hdd to a new computer. Is this an easy job? Can I just take it out of one computer and put it in a new one or is it a complicated procedure? I´m also thinking of putting it in an old computer. Can you just unplug the hdd already in it and plug in the one from my recently deceased computer? Or is that too simple? The hdd I want to move has Vista. Old computer probably XP and if I buy a new one Windows 7. Any help much appreciated.