So I started by emptying my Temp files (is there an easy way to do that or do you have to go to the folder and manually delete everything?) and I tried to defragment my disks, but it said defrag is already scheduled for once a week, which I was unaware of. Apparently, it's been doing that all along because it says all of my disks (suddenly there were four!) are 0% fragmented (I defragmented C: anyway just in case).
I used Delfix to clean everything up, and disabled Java and installed Malwarebytes. Will that conflict with my current antivirus (Avast)? Should I uninstall Avast and use only Malwarebytes or is it okay (or even necessary) to keep them both?
Everything seems fine, except the computer froze up again today, and I wasn't even using it. I just left it for a couple of minutes to go check on something in the kitchen and when I came back it was just frozen, like the other time. I had to hard shutdown again since nothing seemed to work. Both times, I had Chrome open and there were about 10 tabs open at the same time, so I'm not sure if that could be it. It's not a particularly problematic thing if it only happens once in a while, but it could be a pain in the butt if it keeps going like this.