Fix Windows Security Not Opening on Windows 10: Quick Solutions

If you're having trouble opening Windows Security on Windows 10, here are some quick and effective solutions to help you resolve the issue.

How to fix Windows Security not opening in Windows 10?​

1. Run the Windows Security Troubleshooter​

1. Go to Settings:
   • Click on the Start button on your taskbar.
   • Select Settings (the gear icon).
2. Navigate to Troubleshoot:
   • In the Settings window, go to Update & Security.
   • Click on Troubleshoot on the left pane.
3. Run the Troubleshooter:
   • Scroll down to find Windows Security.
   • Click on Run the troubleshooter.

Following these steps will diagnose and fix common Windows Security issues, potentially restoring the functionality of the app.

2. Repair Windows Security using DISM​

1. Open Command Prompt as Administrator:
   • Click on the Start button and type cmd.
   • Right-click on Command Prompt and select Run as administrator.
2. Run DISM Commands:
   • Type DISM.exe /Online /Cleanup-image /Restorehealth and press Enter.
     
   • After the first command completes, type DISM.exe /Online /Cleanup-image /StartComponentCleanup and press Enter.

Using the Deployment Imaging Service and Management Tool (DISM) will scan and repair corruption in the Windows image, which might fix issues preventing Windows Security from opening.

3. Re-register Windows Security Apps​

1. Open Command Prompt as Administrator:
   • Click on the Start button and type cmd.
   • Right-click on Command Prompt and select Run as administrator.
2. Run PowerShell Command:
   • Type powershell -ExecutionPolicy Unrestricted Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"} and press Enter.

Re-registering app packages can resolve issues with apps that are not functioning properly, including Windows Security.

4. Reset Windows Security App​

1. Go to Settings:
   • Click on the Start button on your taskbar.
   • Select Settings (the gear icon).
2. Navigate to Apps:
   • In the Settings window, go to Apps.
     
   • Click on Apps & features on the left pane.
     
3. Find Windows Security:
   • Scroll down to find Windows Security.
   • Click on it and select Advanced options.
4. Reset the App:
   • Click on the Reset button.

Resetting the Windows Security app can clear any corrupted settings or files that might be causing the issue.

5. PowerShell Command to Reset Package​

1. Open PowerShell as Administrator:
   • Click on the Start button and type powershell.
   • Right-click on Windows PowerShell and select Run as administrator.
2. Run Reset Command:
   • Type Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage and press Enter.

This command targets the Windows Security package, resetting it to its default state.

Additional Community Tips​

• Check for Expired License:
  If your Windows license has expired, security features might be disabled. Reactivating your license might resolve the problem.
• Community Forums and Feedback:
  Engage with community forums like Microsoft Tech Community and Reddit to see if others have found additional solutions.

By following these detailed steps, you can troubleshoot and resolve most issues with Windows Security on Windows 10.