how do I reinstall windows defender for windows 10

If you are facing issues with Windows Defender on your Windows 10 device, you may need to reinstall it to ensure that your system is protected from malware and other security threats. Here are the steps you can follow to reinstall Windows Defender on your Windows 10 device:

1. Open the Start menu and type “Windows Security” in the search bar.
2. Click on the “Windows Security” app from the search results.
3. In the Windows Security app, click on the “Virus & threat protection” tab.
4. Under the “Virus & threat protection” tab, click on the “Manage settings” link.
5. Scroll down to the “Exclusions” section and click on the “Add or remove exclusions” link.
6. In the “Exclusions” window, click on the “Add an exclusion” button.
7. Select “Folder” from the drop-down menu and browse to the following location: C:Program FilesWindows Defender
8. Select the “Windows Defender” folder and click on the “Exclude this folder” button.
9. Close the “Exclusions” window and the “Windows Security” app.
10. Open the Command Prompt as an administrator by right-clicking on the Start menu and selecting “Command Prompt (Admin)”.
11. In the Command Prompt window, type the following command and press Enter: “sc config WinDefend start= auto”
12. Restart your computer to apply the changes.

After following these steps, Windows Defender should be reinstalled on your Windows 10 device and should be working properly. If you continue to experience issues with Windows Defender, you may need to contact Microsoft support for further assistance.


I hope these steps were helpful in reinstalling Windows Defender on your Windows 10 device. Remember to keep your system updated and run regular scans to ensure maximum protection against security threats. If you have any further questions or concerns, don’t hesitate to reach out to Microsoft support for assistance.

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