Unless the latest virus definitions are installed, the anti-malware tool might fail in detecting some recent threats, which could lead to data theft and a compromised system. Alternatively, open the Windows Security app and click on Restart the service.Running any signature-based antivirus without the latest definitions might lead to serious security-related problems. To reenable Windows Defender again boot into Safe mode, and uncheck the Service WinDefend on Autoruns.Due to this change, Controlled folder access is also turned off. You will find that under Virus & threat protection settings, Real-time protection, Cloud-delivered protection, Automatic sample, submission, and Tamper protection are disabled permanently. Select Restart to return back from Safe mode.Go to the Entries column, scroll down and find WinDefend.Now, click Options from Menubar and uncheck Hide Windows Entries by clicking on it.Once Autoruns Systeminternals appear, click on the Services tab and allow the items to load.When you are in Safe mode, open the Autoruns program that you unzipped in the normal mode.Close the ongoing works and select – Restart.On the System Configuration Window, select – Boot tab.When the result shows up, click on – Run as administrator.Go to this page and click Download Autoruns.Make sure that Windows Defender is turned off using the above method then proceed.Using the following way, you can disable Windows Defender Permanently in Windows 11 – Whenever you will reboot your system the security settings will be automatically reversed and turned on once again. The above method, however, will disable Windows Defender in Windows 11 but until the next restart. Way-2: Using Autorun disable Windows Defender in Windows 11 Permanently

To re-enable click the same toggle switch.

User account control will be prompted, click on – Yes.

On the next page, Under Real time protection section, click the toggle switch.

Windows Security app will prompt up, click on “Manage settings” link there.

From the next page, click – Virus & threat protection.

Select – Windows Security from the right pane.

Press Windows key + I together to open Settings.

Here is how to disable Windows Defender Permanently in Windows 11 – Way-1: Through Windows Security app

Disable Windows Defender Permanently in Windows 11

Download windows defender windows 11