Need Help With Diagnosis

just bought and downloaded garry’s mod, tried to run it and i got a loading screen tthen a second later it crashes and dissapears off my screen. I run a windows 7 hp notebook and i usually never have issues with theese kind of games.

Specs? And do you own any other source games?

I have counter strike: source, and my laptop is a hp pavillion dv6 has a centrino 2 duo and a mobile intel 4 express drive

i had the same problem, just right click on the garrys mod icon, go in set launch options and type in
-dxlevel 80 and then run gmod, see if that works and if it doesnt try 70 instead of 80

that worked, thanks!