Insane Lag

Whenever I start up garrysmod I am getting extreme lag, including the title screen. I start up singleplayer and I’m getting a steady 10 frames per second when I normally get upwards of 150. I even tried to turn down my graphics all the way but it still stays at 10 frames per second. And for some reason this seems to be happening for all of my source games too.

Could be a windows Process, I really don’t know.