CSGO freeze and buzzing sound problem.

[Raidzor]

A few days ago i had to change a couple of settings because i wanted to boost my framerate in cs:go and i followed a video which said to change some settings in regedit (something like GPU priority and other stuff), make some steam launch options and updating my drivers. My FPS didn't move from 60 (exactly as before), and i had weird game freezes with annoying loud buzzing sound (couple ms before the freeze,looped) which caused the entire system to freeze and the only way to get out of there was holding the power button and forcing shutdown. They happen somewhere from 20 to 100 minutes in game, randomly.
My question is: can i reset my regedit to before somehow? I have no backup (i hate myself for this) ...
I have no thermal problems, i run around 70 degrees in-game, my specs are kind of weak but i have a laptop so...

I have:
i3 2.0GHz
NVidia 920m
4GB Ram

 

[penguintech]

try doing a system restore back to a restore point BEFORE you made the changes in regedit. that usually will do the trick. Otherwise, there are other more technical options that you can try if that doesn't work.
See the tutorials in this article.

http/www.makeuseof.com/tag/fix-windows-registry-errors-not-bother/

 

[Raidzor]

try doing a system restore back to a restore point BEFORE you made the changes in regedit. that usually will do the trick. Otherwise, there are other more technical options that you can try if that doesn't work.
See the tutorials in this article.

http/www.makeuseof.com/tag/fix-windows-registry-errors-not-bother/

Thanks for the answer.
I tried to downgrade my NVidia drivers to the factory status, hope it works, can't tell now....
If it doesn't i'm gonna try to reinstall windows, because my latest backup had almost no files in it so reinstalling windows is pretty much the same.