My computer is still really bugged and sometimes slow, I can't open up multiple tabs or multitask that well. Also my when I edit a file in Program Files, it reverts back to before I edit it
What is your opinion on reinstalling your system? I see there are a lot of services missing, there are no drivers, probably a lot more things are affected. We can try to fix this, but I think it is easier to reinstall your PC.
I am not sure I can help you with reinstall this way. There are tutorials on the web, but if you're not too familiar with computers, then I suggest to take it to repair shop.