FIX: Windows Defender won’t turn on Windows 10

Windows comes with a built-in antivirus known as Windows defender. However, sometimes Windows defender tends to delete files that aren’t a threat to the system, and if you think they’re useful to you, you can use this step by step guide to restore them.

Photo by Markus Spiske

Perform a clean boot:

  • Press the Windows key + R key
  • The RUN dialogue box will appear.
  • Type MSConfig and press Enter
  • Now head over to the services tab in the system configuration window and choose the hide all Microsoft services option.
  • Now click the Disable all button.
  • Now head over to the Startup tab and click open task manager.
  • Now disable every startup item from the list.
  • Now navigate back to the system configuration window and click apply.
  • Click ok and save changes.
  • After that, restart your PC and see if the issue is fixed.

Run Windows Update:

  • Head over to the Settings and then click on Updates & Security
  • Then click on check updates
  • Update the Windows and see if the issue is fixed


  • Then press Enter
  • After SFC is scanned, type in the DSIM command mentioned below.

DISM.exe /Online /Cleanup-image /Restorehealth

  • After the command runs, restart your PC

If the article was useful to you in fixing the error, leave your feedback in the comments section below.

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