I had a friend with an old PC that could not boot. He asked me if I could attempt to retrieve the files from it. I agreed and plugged it into my PC alongside my boot drive.
PC would not start into Windows 8.1 with the drive attached. After removing the drive I could get to my Windows 8.1 login screen, sign in, and be greeted by a black screen but with the cursor visible and movable. I could ctrl+alt+del, but could not get a task manager, just the purple screen.
Tried a few solutions, eventually ran a system restore. That worked and fixed the problem. My question is why did this work and what happened? My OS is installed on a different hard-drive (SSD) than the old one that I was attempting to get data off of. Could there have been a virus on this drive? Malware? My PC seems fine now but should I re-install my OS just to be safe?