System restarted when launching

when i click on "play" button, my pc is restarted and i don't know what to do.. somebody can help me , please??

 

1. right-click "computer" or "my computer"
2. click "properties"
2a. (only for vista/7) click "advanced system settings"
3. choose tab advanced
4. within the "startup and recovery" setting group click the "settings" button
5. uncheck "automatically restart"
6. confirm changes by clicking "ok" or "apply".

now you have prevented the windows from automatically restarting your computer when it encounters a fatal crash, known as bsod (blue screen of death).
if a bsod indeed occurs when you press play make a clear photo of it and post it here.