Garry's mod servers menu problem

hello I have a problem with my game, when do I start garr’ys mod and I arrive in the server list freez my game and I can not go back on windows I am forced to restart my computer. I tried to uninstall it and install it but it did not work. Thank you to answer me quickly.

Try to check the game cache, to do:

“On Steam > Right click on Garry’s Mod > Properties > Local Files > Verify integrity of game cache”