Garrys Mod NOt Working! Help Please... :(

So I got in to Garrys Mod yesterday, and tried going into multiplayer and it kicks me off and says in a pop up “hl2 stopped working” and it does the same thing when I try to go into toybox as well. I don’t know a lot about what to do when a game stops working. I am not always gaming constantly.

(User was banned for this post ("wrong section" - postal))

What kind of computer do you have, and is this Garry’s mod 13 beta?

Go to console and type “vgui_allowhtml 0” before joining a server

Well, that escalated quickly.