2. If Safe Mode is not working, download, burn to CD or write to flash stick, boot and run a full scan with Windows Defender Offline.
I got Windows Defender Offline loaded up on my USB flash stick. it booted up to do the quick scan. it finished the quick scan in about 12 minutes. no errors.
Then i tried to do a full scan. it got stuck at 50,000 items and about 32minutes time elapsed. the "Time elapsed" counter stopped moving, but the green bar animation kept going.
it was stuck there for about an hour, so i did a hard reset of the computer and now i've restarted the full scan. will update asap.
if it gets stuck again, i won't be able to try the other anti virus CDs as i don't have access to a computer with a CD/DVD drive
Edit: got stuck again at about 32 minutes with 220124 items scanned.