Black Screen on World Startup

Hey guys, I’m having a bit of trouble with my Garry’s Mod recently. Every time I go to start up a world from the menu, I get a black screen upon arrival. I’ve tried fixes such as reinstalling drivers and installing different newer/older drivers, but to no avail. I’ve also tried the FAQ and it’s steps but that has not solved the problem. I was successfully running Garry’s Mod about 2 weeks ago and I don’t think any settings have been changed in my computer since then. I have also tried re-installing Garry’s Mod. My computer well matches the specs for Garry’s Mod and I easily push 200+ FPS when the game was running before. I hear sounds and can click buttons on the menu, if I guess their position correctly.

Specs:
Graphics Card: GTX 750ti EVGA
Processor: Athlon X4 760K
RAM: 1x8GB Kingston HyperX Blu
Graphics Driver: Nvidia GeForce 337.88

Any help would be appreciated on this, thanks!

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Thank you!