1. Try restarting your computer.
  2. Try uninstalling Windows Security and reinstalling it again.
  3. Try using a different computer or device to test the Windows Security program on.

Ways to Fix When Windows Defender Won’t Open on Windows 11

Reset or Repair Windows Security

  1. Open the Start menu and search for “Windows Security.”
  2. Click on Windows Security to open it.
  3. Under “Action Center,” click on “Windows Update.”
  4. On the left side of the window, under “Updates from Microsoft,” click on “See all updates.”
  5. In the right pane, under “Available updates,” click on “Install updates.”
  6. Under “Update type,” select the option that says, “One step update (recommended).”
  7. Click on the blue button that says, “Install updates.” After installing these updates, Windows will check for and fix any problems with your apps or with Windows Security itself. ..

To open Windows security on Windows 11, follow these steps:

  1. Open the Start menu and click on the “Windows Security” icon.
  2. On the window that opens, click on “Open Windows security”.
  3. On the window that opens, you will see a list of options. Click on “Change settings for this PC”.
  4. On the window that opens, under “Security options”, click on “Windows Defender Antivirus”.
  5. Under “Windows Defender Antivirus settings”, make sure that the option to “Enable real-time protection” is selected and then click on OK. ..

In the “App settings” screen, you can change how your app behaves. You can choose to have your app work like a normal website, or have it work like a phone application.

On the right side of the display, navigate to the “Reset” category. This will reset your device to its factory settings. ..

Windows Security is not working. Follow the same steps again and in the last step, click “Reset” instead of “Repair.” This should help resolve any configuration issues that prevent Windows Defender from starting.

Use SFC and DISM

If you’re having trouble with Windows 11 applications, it’s possible that corrupted or altered data is to blame. Fortunately, there are a few ways to fix the problem and get your applications back up and running. First, you can use the SFC tool to check for corrupted files. If there are any problems, you can use the DISM tool to restore the files to their original versions. ..

In the command prompt, type the following: cd C:\Windows\System32 Type the following command: net stop netlogon Type the following command: net start netlogon ..

Type the following command and press Enter: net stop wuauserv Type the following command and press Enter: net start wuauserv ..

The SFC tool can be used to scan your system for malware. After the SFC tool is started, it will wait for a few minutes for it to complete its scan. If there are any results found, the user will be able to see them in the results pane.

If the scan was successful, you will see a message on the cmd terminal stating “Scan completed successfully.” If the scan was unsuccessful, you will see a message on the cmd terminal stating “Scan failed.” ..

Windows Security is a program that can help you fix problems with your computer. If the problem persists, you may want to run a DISM scan.

To launch the Command Prompt with administrative privileges, you first need to retrace your steps from above. To do this, open the Start menu and type “cmd” (without the quotes). When Command Prompt appears, type “cd” (without the quotes) and then press Enter. Next, type “cmd” (again, without the quotes) and press Enter again to launch the Command Prompt with administrative privileges. ..

sudo apt-get update sudo apt-get upgrade sudo apt-get install -y software-properties-common sudo add-apt-repository ppa:webupd8team/java sudo apt-get update sudo apt-get install oracle-java8-installer ..

Disable Background Apps

Windows Security is a system-wide security feature that helps protect your computer from unauthorized access. To keep Windows Security effective, use Task Manager to force processes to terminate if you think they might be causing problems. Additionally, clean boot your computer to ensure that any unauthorized processes are eliminated before starting up.

Start Menu and type msconfig.

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On the “Services” tab, select the “Windows Update” service. On the “Windows Update” service, click on the “Update Now” button.

Disable all Microsoft services on your computer.

Task Manager is a tool that can be used to monitor and manage the tasks that are running on your computer. By opening Task Manager, you can see which tasks are taking up the most resources and which tasks need to be completed before they can be completed.

To disable startup programs on your computer, navigate to the Startup tab and disable all the programs by pressing the button at the bottom. This will help to speed up your computer and make it more efficient. ..

If Windows Security starts up without problems, it’s likely that a recently installed program or app is causing the problem. You may need to uninstall the program or app to fix the problem permanently. ..

Final Words

Windows 11 users are reporting that they are no longer able to access the Windows Security app. The majority of customers run into this problem when trying to modify Windows Defender settings. However, nothing happens when you click or (double-click) on the Windows Security programme.