In the Run dialog box, type msconfig, and hit Enter to open System Configuration on your PC.You can do so by pressing the Windows + R key combo. To perform a clean boot, follow the steps given below.

You may try performing a clean boot and then check if the issue persists or not. These services may hinder Windows, thus causing Windows Defender not to work properly. Third-party services and programs in the startup may also interrupt the Windows performance and can cause the issue. If Windows Defender is not working in Windows 11, then you should move to the next step.

After the process is completed, close the command prompt, and restart your PC.Ĭheck if the Windows Defender is working or not.

Wait for the Command Prompt to do its work, and do not close the terminal until then.

In the Command Prompt, type sfc /scannow and hit Enter to execute the command.

In the search results, select Command Prompt, right-click on it and then click on Run as administrator. To run the SFC Scan, follow the steps given below. SFC scan fixes any corrupt system files, which may also be causing the issue. If restarting the Security Center Service and updating Windows didn’t help fix Windows Defender not working in Windows 11, you can try running the SFC Scan. After updating your PC, restart it to fix the issue you faced.

Now download and install all the updates.

Here click on Check for updates to begin checking for updates.

Head to the Windows update from the left sidebar on your Settings.

Open the Settings of your PC by pressing the Windows + I key.

To update the Windows, follow the steps given below.

You may face this issue due to bugs in your operating system, which may be fixed by updating Windows. The next thing that you can do is update your Windows. Right-click on it, and then click on Restart.

Windows 11 windows defender not working