Your PC will be protected from malware and viruses by Windows Security App, which also comes with Windows Defender Service. It can experience issues, like Windows Security Not Opening, much like other Windows applications.

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When you try to open Windows Security, it could occasionally display odd errors. The Windows Security window shows for a brief moment before closing. Sometimes windows security is closed. In this guide, I will help you learn the eight best ways to fix this issue in no time.

Contents show

1 What Is Windows Defender? Is It the Same As Windows Security?

2 Methods To Fix Windows Security Not Opening Issue

2.1 1. Restart The Windows Security App
2.2 2. Reset Or Repair The Security App
2.3 3. Update Windows 11 OS
2.4 4. Disable Third-Party Antivirus Program
2.5 5. Run The System File Checker (SFC Scan) And DISM Scan

2.5.1 System File Checker (SFC Scan)
2.5.2 Deployment Image Servicing and Management (DISM Scan)
2.6 6. Reinstall Via Powershell
2.7 7. Reset Your PC
2.8 8. Modify The Registry File Using Registry Editor

What Is Windows Defender? Is It the Same As Windows Security?

Windows Defender, formerly Microsoft AntiSpyware, protects a system from malware. It was designed to prevent unauthorized access and shield Windows systems from malicious malware. The Windows Vista installation pack introduced it. As a component of Microsoft Security Essentials, it is currently free to download.

Microsoft Defender Antivirus is part of Windows Security settings. Windows Defender Security Center is the name of Windows Security in prior Windows 10. Microsoft Defender Antivirus will immediately shut off if you have another antivirus program installed and activated. Microsoft Defender Antivirus will restart immediately if you uninstall the other application.

Methods To Fix Windows Security Not Opening Issue

    Restart The Windows Security App Reset Or Repair The Security App Update Windows 11 OS Disable Third-Party Antivirus Program Run The System File Checker (SFC Scan) And DISM Scan Reinstall Via Powershell Reset Your PC Modify The Registry File Using the Registry Editor

1. Restart The Windows Security App

The Windows Security app might not open on your Windows PC if there is an issue with the Windows Security Center service.

Users should restart the Windows Security Center service on the computer to see if that fixes the problem.

To launch the system’s Task Manager, use CTRL + SHIFT + ESC. Navigate to the Services tab in the Task Manager, as shown below.

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Right-click on the Security Center Service (wscsvc) after finding it by searching for it. In the context menu, choose Restart, as seen in the screenshot below.
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Close the Services window after it is finished. Check if the Windows Security Not Opening issue is fixed or not.

2. Reset Or Repair The Security App

Windows Security may have “windows security not opening” issues as a result of caching data. Your first action in this circumstance should be resetting the Windows Security app from the App area.

To reset the Windows Security app, adhere to the instructions.

To launch the Settings menu on your Windows PC, press the Windows +I key. Select the Apps icon from the menu after entering the Settings menu.

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Select Installed programs in the right section. Once you’ve located Windows Security, select Advanced options by clicking the Icon.
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Scroll down to the Reset tab under Windows Security’s Advanced Options, then select the Reset button.
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Confirm the prompt when it appears, then hold off until the process is finished. Check Windows Security after a restart to see if it is not available.

3. Update Windows 11 OS

All operating systems require updates. These upgrades also include bug fixes in addition to new features and security patches.

You can download and instal any updates that are available to see if it fixes the problem. Check to see whether there are any outstanding updates by opening the Settings app.

For Settings to open, press Win + I and go to Windows & Security section.

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Select “Windows Update” from the list at the bottom of the left-hand pane. To see if there are any pending changes, click the “Check for updates” button.
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If your PC isn’t current, continue to instal updates. Check to see if the Windows Security issue has been resolved when your computer has restarted.

4. Disable Third-Party Antivirus Program

Running Windows Security alongside third-party antivirus software has been known to interrupt Windows systems in various ways. You should probably uninstall any additional antivirus software installed on your computer. Microsoft prohibits the use of multiple security technologies at once.

For Settings to open, press Win + I. Click “Apps & features” after going to “Apps.

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Look through the installed apps for any external security programs. Click the antivirus program you want to remove, then choose “Uninstall.”
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Restart Windows after removing all third-party antivirus programs to see if the issue still exists.

5. Run The System File Checker (SFC Scan) And DISM Scan

Specific built-in Windows 11 components, such as Windows Security, may stop working if your system files corrupt. Use the Deployment Image Servicing and Management tool and System File Checker to find and fix corrupt system files.

System File Checker (SFC Scan)

SFC checks for file corruption and then tries to repair it.

Launch the command prompt as Administrator after typing “command prompt” into the Start menu search field. This starts the elevated command prompt that you must have in order to use the SFC tool. Enter the following command into the Command prompt:

  • SFC/ scannow

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After the utility has finished scanning your computer, you should be able to launch the Security software.

Deployment Image Servicing and Management (DISM Scan)

Open the command prompt with admin privileges as mentioned above. To use the DISM utility to restore system health, copy and paste the following command, then press Enter.

  • Dism /Online /Cleanup-Image /RestoreHealth

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6. Reinstall Via Powershell

Use the Windows search box to look up Powershell. To run as administrator, right-click the Powershell icon and select run.

  • Powershell Admin Min

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To restore Windows security, copy and paste the commands one at a time and press Enter after each one.

  • Set-ExecutionPolicy Unrestricted

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To run the aforementioned code, press Y and then hit enter. Run the below-listed command.

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

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Reopen the PowerShell windows after closing them.

7. Reset Your PC

Resetting your PC setting restores your computer to its default settings. It’s far better than reinstalling Windows from scratch. You may reset your computer while retaining all of your private files and folders.

Enter “settings” in the Start menu search bar, then click on the same. Go to Recovery by selecting System from the Settings menu. Click Reset PC in the Recovery options tab.

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Next, choose “Keep my files” and “Local reinstall,” and then press Next.
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Your Windows will be formatted and reinstalled if you follow the onscreen directions. Now, Check if the Windows Security Not Opening issue is fixed or not.

8. Modify The Registry File Using Registry Editor

A Registry key may be used to disable Windows Security. You can fix the problem in this case by launching Registry Editor and making modifications to the DisableAntiSpyware setting.

Open the Registry Editor by following the steps below, then check to see if the DisableAntiSpyware setting is enabled.

To begin, hit Windows key + R to see the Run dialogue box. To open the Registry Editor with administrator access, type “regedit,” then press Ctrl + Shift + Enter.

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Use the menu on the left to find the following place once you’re within the Registry Editor:

  • HKEY_LOCAL_MACHINESOFTWAREPoliciesMicrosoftWindows Defender

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Double-click the DisableAntiSpyware registry setting (or create the registry key in Dword (32-bit)), and then change the Value data to 0 and the Base to Hexadecimal. Restart your computer to see if the “Windows Security Not Opening” issue has been resolved.

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