system restarts

i have problem in desktop pc, after 15 mins of working the system gets restarts automatically and the error mssg is shown after it comes desktop

http://www.freeimagehosting.net/imag...3d902ad630.jpg

http://www.freeimagehosting.net/imag...d14b7d7b29.jpg

m b the os is corrupted r it m b the ram fault

Check the power supply.