Gmod Crash

Ive been crashing alot on gmod
after I did this

I can kill NPC’s Again Without crashing, Do stuff more Smoothly, But when I spawn a Combine Elite, And kill him with mah mighty Crowbar, I crashed D: (And Restarted)
My Graphics Card : Intel GMA 4100
Yeah, I know it sucks.

Is there a way to prevent me from Crashing? :3