Gmod crashes on startup!

Hey. I was playing before when my game froze. I heard an error message but I couldn’t alt+tab or ctrl+alt+delete to see anything. I restarted my computer and since then I can’t seem to start the game.
When I launch it it says “Preparing to launch Garrys-Mod…”
And then nothing happens. It doesn’t start but it won’t give me an error message either.

I tried reinstalling garrysmod so I don’t believe that’s the problem.
I also tried -dxlevel81 -w 1280 -h 1024 but no difference.

Any ideas?

How long do you wait? Mine takes a while to load

It hasn’t started yet and i tried 15 minutes ago the first time.