How to Fix 'Windows Security Not Opening' Issue on Windows 10/11

By Adnan

How to Fix 'Windows Security Not Opening' Issue on Windows 10/11

Are you trying to open Windows Security on your Windows 10 or 11 PC but nothing happens? This issue is more common than you might think, especially after system updates or malware removal. In this guide, we’ll cover multiple solutions to fix Windows Security not opening or loading properly.

🔍 Why Windows Security Won't Open?

There are several possible reasons:

  • Corrupt system files
  • Windows Defender service not running
  • Recent OS update bugs
  • Third-party antivirus conflicts

✅ Fix 1: Restart Your PC

Simple but often overlooked — a full system reboot can resolve temporary glitches that prevent Windows Security from opening.

✅ Fix 2: Run System File Checker (SFC)

  1. Press Win + S and type cmd
  2. Right-click on Command Prompt → Run as administrator
  3. Type sfc /scannow and press Enter

This will scan and repair corrupted system files that may affect Windows Security.

✅ Fix 3: Restart Windows Security Center Service

  1. Press Win + R → Type services.msc → Enter
  2. Find Security Center
  3. Right-click → Click Restart

✅ Fix 4: Use PowerShell to Re-register Windows Security

  1. Open PowerShell as Administrator
  2. Run this command:
    Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage

This resets the Windows Security app package, often resolving broken app behavior.

✅ Fix 5: Disable Third-party Antivirus

If you’re using third-party antivirus software, it may block or disable Windows Defender and its interface. Try temporarily disabling or uninstalling it and check again.

✅ Fix 6: Use Windows Update Troubleshooter

Windows Security issues are sometimes tied to update failures.

  1. Go to Settings → System → Troubleshoot → Other troubleshooters
  2. Run the Windows Update troubleshooter

🛠 Bonus: Reset Windows Security App (Settings)

  1. Go to Settings → Apps → Installed Apps
  2. Search for Windows Security
  3. Click the three-dot menu → Advanced options
  4. Click Reset

🔚 Final Thoughts

If none of the fixes work, you may need to perform an in-place upgrade or clean install of Windows. But in most cases, one of the above steps should restore Windows Security functionality quickly and safely.

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