Could your 8.1 be updating itself? Had a Windows 10 Home machine that would not stop updating itself, it had been updated to 10 from 8 and had been driven insane in the process and never worked well wirelesswise. It got a deep lobotomy and the box is now occupied by Linux Mint. Try to fix your 8 because 10 could be worse.
I had somewhat the same problem with a laptop. I made the mistake of updating from 8.1 to 10.
I was about to go to press with a novel, and the damn thing went nuts one night. I overnighted a new laptop to myself and was able to get the ailing laptop booted in safe mode and got the important files migrated. After that, it sat on the edge of my desk, plugged in and running. THat was August.
In December, I had an issue that required digging on the old laptop. I opened it up, and hit the space bar. It had mended itself in the intervening months and was now running solidly on WIN 10. I brought it up this past week to do some deep diving. It's running better than it ever did on WIN 8.1.
For my personal use, I've converted 100% to Ubuntu. I leave Windows at the door when I leave work. I've also converted some of my friends to it-- the ones that just need email and internet browsing. I can take one of their old machines and turn it into a fast friendly machine that doesn't require any hands-on maintenance.