Windows Security may sometimes throw up all kinds of strange errors when you try to launch it. For example, it may suggest you need a new app to open the Windows Defender link. The Windows Security window briefly opens but then automatically disappears. If restarting your computer doesn’t solve the problem, pursue the troubleshooting solutions below.
How Do I Fix Windows Security Not Opening on Windows 11?
Repair and Reset the Windows Security App
- Go to Settings.
- Select Apps.
- Go to Apps & features.
- Locate the Windows Security app.
- Click on the three dots and select Advanced options.
- Hit the Repair button.
- If the issue persists, hit the Reset button.
You can also use PowerShell to reset your Windows Security app package. Launch PowerShell with admin rights and run the following command: Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage. Then close the PowerShell window and check the results.
Run SFC and DISM
If your system files got corrupted, specific built-in Windows 11 components, such as Windows Security, may stop working. Use the System File Checker and Deployment Image Servicing and Management tools to detect and repair faulty system files automatically.
- Click on the Search icon and enter cmd in the Search field.
- Right-click on Command Prompt and select Run as administrator.
- Then, run the sfc /scannow command. Wait until the SFC tool scans your system.
- Run the Dism/Online/Cleanup-Image/RestoreHealth command as well.
- Restart your computer and check if the issue is gone.
Disable Background Apps
Launch the Task Manager and force-stop all the unnecessary processes running in the background. Some of them might be interfering with Windows Security. Alternatively, you can also clean boot your computer to ensure nothing’s interfering with Windows’ built-in security solution.
Disable and Uninstall Third-Party Security Tools
As a quick reminder, you can’t run two different antivirus solutions on your system. It’s best to turn off any third-party antivirus apps you may be using. If the issue persists, disable your third-party firewall, anti-malware tool, and so on. Check if you notice any improvements. If you still can’t open Windows Security, uninstall third-party security solutions and check the results.
If you can’t open Windows Security on Windows 11, use PowerShell to reset the Windows Security app package. Then, repair and reset your Windows Security app. Additionally, run SFC and DISM to restore faulty system files. If the issue persists, disable and uninstall third-party security tools.
Which of these solutions worked for you? Let us know in the comments below, and don’t forget to share this guide on social media.