Don't worry if your Windows Defender fails to scan on your Windows 10 computer. When you diagnose the exact cause, you can fix the issue without much effort. In this article, we have listed the best techniques that can help you fix the problem.

Check the exclusion list

  • Press the Windows and I keys simultaneously to open Settings.
  • On the Settings screen, navigate to the Update & Security section and click Windows Security.
  • From the right pane, click Open Windows Defender Security Center.
  • Choose Virus & threat protection> Virus & threat protection settings.
  • Go to the Exclusions section and click Add or remove exclusions.
  • Check whether the system drive is listed in the exclusion list. If so, remove it.

Use a different antivirus program

  • If your Windows Defender fails to perform a quick scan on your Windows 10 computer, the best solution will be shifting to a different antivirus software.
  • Look for a better antivirus program in the market and install it on your computer.
  • It is important to strengthen the protection of your system by installing any trustworthy antivirus software. You can select the software according to your requirements and preferences.

Update to the latest version

  • Open Settings by pressing the Windows and I keys.
  • On the Settings screen, click Update & Security.
  • In the right pane, click on the Check for updates button.
  • If it shows any updates, install the same on your computer.
  • In most instances, updating the software to the latest version can help you fix the program efficiently.
  • Now, check whether Windows Defender scans your Windows 10 computer. If not, proceed with the next solution.

Restore your system

  • Press the Windows and S keys simultaneously and enter system restore.
  • From the menu, choose the Create a restore point option.
  • In the System Properties window, click the System Restore button.
  • Now, your system will start to restore. Click Next to proceed further.
  • You can also choose the Show more restore points option.
  • Finally, choose the restore point you prefer and click Next.
  • Follow the instructions and wait until the restoration process gets completed.

Try out all the troubleshooting techniques and check whether the issue is resolved. If you cannot resolve the problem yet, reach out to us.


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