Okay, so if you overclocked your PC just go back to default. Try to Google this all, because I’m on phone and at work
try to;
1 Verify your game files through steam
2 Updating all of your drivers and windows
3 Run a memory test (a false memory can cause freezes like yours)
4 Download DDU and reinstall GPU driver
5 Run a windows verify through CMD (
See) after scannow try this in the same CMD
DISM /Online /Cleanup-Image /RestoreHealth
Restart your pc and check game. If you run OBS as admin try to not and see if that helps, also don’t run obs in high priority just leave it as normal and CSGO too. You can try to untick CSGO of the first core of your processor in task manager to see it’s better.