8 Ways to Fix Windows Security Not Opening or Working on Windows 11

8 Ways to Fix Windows Security Not Opening or Working on Windows 11

Windows Security is a security app that provides real-time protection against viruses and malware for your computer. Windows Defender is part of this suite. If you depend on the Windows Security app to monitor your device’s health and performance, it can be frustrating when the app fails to open or work.

8 Ways to Fix Windows Security Not Opening or Working on Windows 11

Before jumping ship to a paid antivirus program, try these troubleshooting tips to fix the Windows Security app not opening or working issue on Windows 11.

1. Repair or Reset the Windows Security App

Windows 11 has a repair tool for fixing app-related issues. You can use it to fix common issues with the Windows Security app and see if it helps.

Step 1: Click the search icon on the taskbar, type Windows Security, and select App settings.

8 Ways to Fix Windows Security Not Opening or Working on Windows 11

Step 2: Scroll down to the Reset section and click the Repair button.

8 Ways to Fix Windows Security Not Opening or Working on Windows 11

If the issue remains after attempting a repair, repeat the same steps and click the Reset button to restore the app settings to their default values and resolve any issues caused by improper configuration.

8 Ways to Fix Windows Security Not Opening or Working on Windows 11

2. Reset the Windows Security App Using PowerShell

Several users on the Microsoft forums reported fixing issues with the Windows Security app by resetting it via PowerShell. You can also try this method.

Step 1: Press the Windows key + S to open the search menu. Type powershell and select Run as Administrator from the right pane.

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8 Ways to Fix Windows Security Not Opening or Working on Windows 11

Step 2: Select Yes when the User Account Control (UAC) prompt appears.

8 Ways to Fix Windows Security Not Opening or Working on Windows 11

Step 3: Paste the following command in the console and press Enter.

8 Ways to Fix Windows Security Not Opening or Working on Windows 11

Exit PowerShell and try using the Windows Security app again.

3. Restart the Security Center Service

The Security Center service monitors security settings on your computer. This service runs automatically when your PC boots up. If it fails to start correctly, you may have trouble accessing the Windows Security app. To fix this issue, follow these steps:

1. Press the Windows key + R to open the Run dialog. Type “services.msc” and press Enter.

2. In the Services window, locate Security Center. Right-click on it and select Restart.

After completing these steps, check if Windows Security is working properly.

4. Run the SFC and DISM Scans

If you’re facing issues with other apps or programs, some system files on your PC may be damaged or missing. You can run the System File Checker scan to replace problematic system files with cached versions. Here’s how.

Step 1: Press the Windows key + X to open the Power User menu and select Terminal (Admin).

8 Ways to Fix Windows Security Not Opening or Working on Windows 11

Step 2: Type the command below and hit Enter. sfc /scannow

8 Ways to Fix Windows Security Not Opening or Working on Windows 11

After completing the scan, you will receive a message stating if the scan was successful.

If the SFC scan doesn’t find any issues or if the problem persists after the scan, run a DISM (Deployment Image Servicing and Management) scan.

Launch the Terminal app with administrative privileges and run the following commands:

DISM /Online /Cleanup-Image /CheckHealth

DISM /Online /Cleanup-Image /ScanHealth

DISM /Online /Cleanup-Image /RestoreHealth

8 Ways to Fix Windows Security Not Opening or Working on Windows 11

Wait for the scan to complete and restart your PC.

5. Uninstall Any Third-Party Antivirus Program

Third-party antivirus programs can interfere with the Windows Security app on Windows 11. To avoid conflicts, disable or uninstall any such program. This will ensure the proper functioning of the Windows Security app.

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6. Perform a Clean Boot

Malicious third-party apps and services on your PC can disrupt Windows operations and cause problems. You can start your PC in a clean boot state to check for this. Press the Windows key + R to open the Run dialog, type “msconfig” in the Open field, and press Enter. Under Services, tick the ‘Hide all Microsoft services’ checkbox. Then, click the Disable all button.

8 Ways to Fix Windows Security Not Opening or Working on Windows 11

Step 3: Switch to the Startup tab and open Task Manager.

8 Ways to Fix Windows Security Not Opening or Working on Windows 11

Step 4: Select a third-party app or program and disable it. Repeat this step to disable all third-party apps and programs.

8 Ways to Fix Windows Security Not Opening or Working on Windows 11

Restart your PC in a clean boot state to try opening Windows Security again. If this resolves the issue, check for any recently installed apps or programs and uninstall them. To return to normal mode, follow the steps above to enable all startup apps and services, and then restart your PC.

Updates are crucial for any operating system, including Windows. In addition to new features and security patches, updates also provide important bug fixes. You can download and install available updates to resolve the issue. To do this, press the Windows key + I to launch the Settings app. Go to the Windows Update tab and click Check for updates. Download and install any pending updates, then check if the issue persists.

8 Ways to Fix Windows Security Not Opening or Working on Windows 11

8. Reset Your PC

If you’re unable to solve the problem, you can reset your PC as a last resort. Don’t worry, you can reset Windows 11 without losing data. However, this process will remove installed apps and reset system settings. To reset your PC, follow these steps:

1. Press the Windows key + I to open the Settings app.

2. In the System tab, click on Recovery.

8 Ways to Fix Windows Security Not Opening or Working on Windows 11

Step 2: Reset the PC.

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8 Ways to Fix Windows Security Not Opening or Working on Windows 11

Step 3: Select the Keep my files option and follow the prompts to reset Windows 11.

8 Ways to Fix Windows Security Not Opening or Working on Windows 11

Windows 11 resets everything, the Windows Security app should work as before.

FAQs on Windows Security Not Opening on Windows

1. Windows Security shows a blank screen in Windows 11 due to interference from third-party antivirus programs or corrupt system files. It can also occur if the Windows Security service is not running.

2. Windows Security and Windows Defender are the same, as Windows Defender is an antivirus program integrated into the Windows Security app.

Security Made Simple

Windows Security issues can put your safety at risk, but they can be fixed with the provided solutions. Apply them all and let us know which one works for you in the comments below.

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Pankil Shah is a freelance writer and Civil Engineer hailing from Ahmedabad, India. He joined Twothirds.Us in 2021 and has since specialized in how-tos and troubleshooting guides for Android, iOS, Windows, and the Web. Additionally, he writes for MakeUseOf and Techwiser. When he’s not writing, Pankil enjoys watching football and planning international trips with his wife.

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