Hi Micronuub and Welcome.
It sounds to me, without seeing any files, as though you could have caught a virus or something similar.
I'd download, install and update Malwarebytes' Free.
Run a full scan in Safe Mode.
There's a rootkit that's been doing the rounds since December that shows itself through blue screens with a IRQ not less or equal
stop code. It usually blames the iastor.sys driver as the cause.
It starts by blue screening/freezing on random programs, then when trying to boot into Normal Mode, then when you try to boot into Safe Mode. Eventually it will allow no access whatsoever.
If this sounds familar, Download TDSSKiller
and run it in Safe Mode. Just to rule out the rootkit.
As long as you can keep Safe Mode open for 30 seconds or so it should be enough to run TDSSKiller and remove the rootkit.
I'm not saying for definite that this is your problem but it won't hurt to run these couple of scans to eliminate the possibility.