My computer restarts when I am playing videos. My pc specs are as follows.
PC - DELL (optiplex 760)
CPU - Intel E8400 (Clock speed 3.0Ghz/ Core 2/ Cache 6mb/ Bus speed 1333mhz)
RAM - 4Gb DDR2 (2 memory modules/ 2Gb each, 800mhz)
VGA - 256mb On board
Power Supply - 305W / DELL original
O/S - Windows 7 64bit
Can anyone suggest what is the problem here and what is the solution.