New
#1
Check your filesystem/system integrity. Something might be wrong there.
It's fixed now. I don't know exactly what fixed it, but I ran the following commands in an elevated cmd.exe:
sfc /scannow
dism /Online /Cleanup-image /Restorehealth
chkdsk c: /f /r /x (restarted after this, took about 4 hours to do the disk check.)