When I open a new game of Garry's mod, Everything's fine. I spawn a few city scanners, hide, and start sniping them.
One problem; when I stab or kill a NPC, or even just touch a mine, (which explodes on contact,) The sound made at that point loops for about 2 seconds, then a blue screen comes up with a few sentences, and the laptop reboots.
This can happen while playing HL2, also, including HL2 DM.
I have a DELL Latitude D610. It's fine when I'm playing blockland, so....
Errors that come up after restart;

Then I click technical info....

What do you make of this?
I'm getting annoyed with this.
Please halp!