- Edited
I am guessing that your hard drive is an SSD, I have had an SSD in the past which gave good smart data but was failing badly all the same. If you have a spare hard drive that can be used to try instead then that would be a good thing to try.
Edit: I have seen SSD drives on Windows with a proper installation go bad and couldn't find a reason for it. No virus, no torrenting, not a whole lot of anything except the registry was all over the place with crosslinks everywhere. Maybe an update failed at the wrong moment due to power outage or a forced restart. It could just be down to bathtub curve failure.
Also it would be worthwhile to test the ram on your PC, there may be a pre boot option to do this in your UEFI/BIOS setup utility.