Question Computer gets black screen every time I open up a game

Apr 10, 2020
Hi! I'm not great with computers so I figured I'd ask for some help on here.

About two months ago I had taken my computer into get fixed for an issue that occasionally occurred on graphics heavy / newer games like Overwatch, and anything with shaders added. The screen would go black but the computer was still running and sounds would still be playing, I couldn't use any key shortcuts or anything to fix it and would have to manually hit the power button to shut it down to fix the issue.

The issue was fixed after the computer repair messed with a couple of windows updates. Tonight it has just started up again except now ANY game I open up will run for 10 seconds - 1 minutes before the screen turns black and I can't do anything. I have made sure my graphics card is up to date and that windows is up to date and I'm not sure what to do next

Here are the specs, let me know if you need anything else:
Windows 8.1
GeForce GTX 760 (192-bit)
Driver Version: 445.75
Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz
15.94 GB RAM
64-bit Operating System, x64 based processor
1920 x 1080, 60Hz