This definitely works. My repair guy told me to do the same thing why I did this to my system on Christmas. Damn it was a saviour.You're going to have to reset your settings and revert the overclocking you setup by:
Turn off the computer.
Turn off the power supply
Unplug the power supply from the wall outlet.
Find the "CMOS Battery", it's silver, about the size of a nickle. It's in a round, black holder.
Remover the battery.
Wait 5-10 mins
Put the battery back in
Plug in the power supply
Turn on the power supply
Turn on the computer
Start the computer.
And do more research about overclocking, as your system can't handle it.