I tried setting up an old computer to use as a personal FTP server. I installed Windows 7 on it and got in working overnight.
The next day later, I was using it to play music. All of a sudden, the music player froze. Any other application I interacted with froze as well. I restarted the computer, only to find that one of the bios settings had changed on it's own, causing the computer to not boot. When I did get the computer boot it went straight to startup repair. It complained of a corrupted registry, and fixed it. I got it to work normally and let it install updates. Right when it was in the middle of restarting to install updates it froze again. This time, I had to remove the bios battery for it to even show the bootloader. Now it's treating WinRE as the primary os. Every time it will say that winload.exe is corrupt, and that the repair failed because of "StartupRepairOffline". Since it was a clean install, I'm not losing anything too important, I just don't want to go through the hassle of reinstalling.