Problem. During a full Windows Security scan, Windows 10 has exhibited some bizarre behaviors:
- the taskbar and desktop icons would occasionally disappear
- screen outside Windows Security window would occasionally turn black
- system would be slow to respond to mouse clicks and keyboard shortcuts
- once, a dialog box appeared saying. explorer.exe: Unknown Hard Error
Diagnostic. Open command prompt as administrator and run:
SFC reported that it found corrupted files, but was unable to fix them.
Fix. Open command prompt as administrator and run:
DISM.exe /Online /Cleanup-image /Restorehealth
When DISM is finished, restart the system and run SFC again:
SFC should report that is found and fixed corrupted files. If not, read up on DISM; there are various advanced options that should help.