I need help with my pc?

If I have a download at Steam or somewhere else and then other stuff like going to the internet or open minecraft GTA I'll be glad to load it for a long time and after some time it will show me a blue screen because your PC has problems we're looking for Problems then the pc restarts I have Nvidia GeForce GTX 460 Amd fx 6300 16 ram in need urgently help

Look at the events display

OK