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Home / developer-tools / Fix 'Could not get lock /var/lib/dpkg/lock' Error on Ubuntu/Debian - Fix Windows Security Won't Turn On Real-Time Protection-Fix 'Windows Defender Command Not Found' After Malwarebytes Install

Fix 'Could not get lock /var/lib/dpkg/lock' Error on Ubuntu/Debian - Fix Windows Security Won't Turn On Real-Time Protection-Fix 'Windows Defender Command Not Found' After Malwarebytes Install

2026-06-13 13:27:18developer-tools
Fix 'Could not get lock /var/lib/dpkg/lock' Error on Ubuntu/Debian - Fix Windows Security Won't Turn On Real-Time Protection-Fix 'Windows Defender Command Not Found' After Malwarebytes Install

Final checklist

  • Confirm that the same symptom is gone after a restart or refresh.
  • Keep the smallest working change and undo temporary diagnostic settings.