Windows 10 acting up

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 /scannow

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 /scannow

SFC should report that is found and fixed corrupted files. If not, read up on DISM; there are various advanced options that should help.

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