Garry's Mod boots up but freezes up everything, Including itself

Alright im really under protective about Garry’s mod so I have another issue, when I boot it up the game tries to load up my addons but freezes up every single thing except my mouse in the process, I may edit this later. EDIT: I verified all mounted games including TF2, Portal 2, and Gmod itself, no issues with that.

Mine does that but when I wait a bit it unfreezes into the main menu.

This used to happen, and I just went on playing whatever I was gonna play in Gmod but now it just freezes up my entire computer except for my mouse