I crash whenever I kill anything or get killed!

So I just re-installed Gmod to my computer after quitting for about 3 months… I had to re-install steam and all of my games. I encountered the singleplayer dead click, but that is fixed for me now. But, whenever I kill someone or something, I crash. I get the message “Hl2.exe has stopped working” I was thinking the -dxlevel 81 would help, but it didn’t. Can anybody help me?

Reinstall Steam.

Post yer system specs.

Oh and verify Gmod cache too