Strange New Problem (Perhaps OS issue?)

So about a week ago I get on my PC before I go to work and notice that it was extremely laggy and slow. So slow in fact that I was never able to make it past the login welcome screen. I tried restarting my PC multiple time, but to no avail. When I got home from work I tried getting on again and was eventually able to get on but everything was extremely laggy and slow. Any time I tried to run a program it would freeze up my computer and I couldn't do anything about it and would have to restart my computer again. Eventually, after many restarts, I was able to get my computer to do basic things, so I ran Malwarebytes and Avast(multiple times), neither of which found anything harmful. Another thing I noticed was that whenever I tried to run a program that refused to load my "disk usage" in task manager would shoot up to 100% and then the program would fail to load up (I tried mutliple programs like Chrome, Steam, Afterburner, File Explorer). Thinking that it might have been a HDD problem I decided to run HDtune to check for hard drive defectives. I think it ended up coming up with .1% bad parts, which I assumed was ok(honestly have no idea). After not finding any solutions I decided to try a system restore in hopes that whatever happened would be fixed by loading up from before my issues. Unfortunately, my problems were not solved. The very next day however I noticed that my PC was working just fine. The PC loaded up as fast as ever, Chrome opened, and I was able to function pretty much normally. Except even after this problem mostly fixed itself I'm still noticing some weird things. First of all, every couple of times I try to login, my PC seems to take a little longer than normal(it's usually instant). Also, Chrome is extremely choppy when scrolling now. So choppy that it's hard to even use sometimes, and what's weird is that this problem does not copy over into MS Edge which works just fine. Also, for some reason my computer's sleep mode setting keeps getting turned off. Whenever I first had my problems I noticed that my computer wasn't going into sleep mode and when I checked the settings I noticed that they were disabled, so I renenabled them. But once more my setting have disabled themselves again for no reason. Another problem that may or may not be related is the fact that the game "Squad" is now very laggy for me which it wasn't before. And another game "Verdun" made my r9 390 reach 94C which I've also never had happen before because I have pretty good airflow. If you have any idea what could be causing my computer to be acting up I would greatly appreciate your input. I honestly have no idea what could be causing me issues, which is why I didn't really know which thread to put this in.

Built just a few months ago:
Windows 10 home 64bit
G580-BK Black SPCC ATX Mid Tower Computer Case
ASUS M5A99FX PRO R2.0
MSI Radeon R9 390
AMD FX-8350 Black Edition Vishera 8-Core 4.0GHz (Cooler Master Hyper 212 EVO attached)
G.SKILL Ripjaws X Series 8GB (2 x 4GB) Overclocked to its "default" 2133
WD BLACK SERIES WD1003FZEX 1TB 7200 RPM 64MB Cache
Corsair CX750M