A few months ago I got hit with something similar. It messed up my computer so bad, I couldn't save it. I ended up getting a new computer. Fortunate, I've backed everything up for years now and on external hard drive (actually 2 of them), and the only think left on my computer are photos, which I back up new ones about once a month.
So when my computer freaked out, I was able to back up the last photos and then it died!
So, then I got a new computer and it happened almost the same, almost immediately. I ended up reformatting and restoring the system, and was able to finally clean the mess out. Luckily, I hadn't put anything new on the new computer. But ever since, I've not had any problems with the new computer.
It all started when "Microsoft" wanted for force install Windows 10!