Need urgent help

Hello toms hardware, i m facing another problem with my pc.

I started fifa 13 and approx playing 1 minute, my pc has fully stopped!

I dont know why that happened. Again i started my pc and want to play far cry 3 and again playing 1 minute the pc stopped!

I again started and checked with 6 games same thing happens!  
But if i simply start my pc and keep it simple and just browse internet then it doesnot happens!

But again i play hitman it again happens!

Any solution Members?

I need it.