Instant Crashing on launch

I’ve downloaded Garry’s mod off of steam. When I attempt to start it, It loads for a few seconds and then crashes.

[editline]03:07AM[/editline]

Ok, never mind, I looked it up and found a fix. Problem solved, people, get back to work!

[editline]03:08AM[/editline]

Dangit, how do I lock this topic?!

stop posting.