Anyway, it started with a KERNEL_DATA_INPAGE_ERROR BSOD while I was playing Factorio.
This is how it looks like right now. My computer's been having issues since a few days ago. The computer stalls permanently after a while when I try to open Chrome (not Mozilla oddly enough). I actually had a problem with a seemingly corrupt profile on Windows (password wouldn't work), had to go through several hoops in startup recovery for it to stop doing that and now it's even slower than usual but it regains it's vigor after about 10 minutes, working without any issue (seems that way), to the point I can even game.
So, what do you guys think? Back all of that up and transfer it all to a new HDD? Also, does anyone have some trustworthy backup programs so I can immediately transfer already installed programs without having to go through installing them all again?