Gmod won't start after crashing when I joined server

Can someone please help me with this? No one seems to have documented how to fix this.

This is after 2 restarts, a reinstall, and a complete addon removal.

[editline]16th January 2017[/editline]

I got a fix!

All you have to do is restart steam and it should work. I have no pirated games on my system, so if it happens to you, it’s most likely because gmod is carrying too much of a workload and accidentally targeted the wrong thing to delete upon joining a server.

It’s mostly running as hl2.exe in Task Manager. You can also try terminate it.