How to Fix Unable To Access Windows Security on Windows 11

Authored by: Support.com Tech Pro Team

1. Introduction

Microsoft’s Windows Security tool, also known as Windows Defender, is the antivirus tool that comes with Windows 11. Windows Security’s real-time antivirus is just what you need, and when this is enabled, you do not need any other third-party antivirus.

In this guide, you will learn How to Fix Unable To Access Windows Security on Windows 11.

2. Fix 1: Try To Repair The App

1. Press the Win+I key to open Windows Settings. Then, go to Apps > Apps & features.
   
   

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2. Then, locate the Windows Security app from the installed app list. 
   
   
3. Now, tap on the three-dot button and select Advanced Options. 
   
4. Thereafter, scroll down and hit the Repair button to start the process.
   
   

3. Fix 2: Run SFC

You can also try running the SFC scan, as it can potentially locate and resolve the error automatically. 

1. Initially, open the cmd using admin rights.
   
   
2. Now, execute the command:

• sfc /scannow

4. Fix 3: Reset The App

Resetting the Windows Security app also helps you fix if you are unable to access Windows Security on Windows 11 PC. Here are some steps that will help you: 

1. Firstly, press Win+I to open the Windows Settings. 
   
   
2. After that, go to Apps > Apps & Features.
   
   

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2. Then, locate the Windows Security app and tap on the three-dot button. 
   
   
3. Now, select the Advanced Options and hit the Reset button located under the Reset section.
   
   

5. Fix 4: Run DISM

Here are the steps that will help you run the DISM on your Windows 11 PC using the cmd:

1. First of all, open the cmd using admin privileges. 
   
   
2. Thereafter, execute these commands one after the other:

• DISM /online /Cleanup-Image /ScanHealth 
  
  
• DISM /Online /Cleanup-Image /RestoreHealth

6. Fix 5: Reinstall The Windows Security App Via Power Shell

In several cases, users complain that they aren’t able to see the Windows Security app on their installed app list. So, in that case, you require to reinstall the system app package using these steps:

1. Initially, open the Windows PowerShell using the admin rights. 
   
   
2. After that, run the command:

• a. Set-ExecutionPolicy Unrestricted

Then, once the above command is executed, run this command and reboot your device:

• Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage - DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}