Simply change a couple of values in Group Policy and Windows Defender should start working again. Even if you don’t use Windows 10, you should be able to apply most of our solutions to the older versions of Windows.
Speaking of Windows Defender issues, here are some problems that users reported:
Windows Defender is a solid antivirus, but sometimes issues with it can occur. This message appears if you installed another antivirus program or an anti-hacking tool that isn’t fully compatible with Microsoft’s built-in antivirus. One of the most common Windows Defender error messages is the following: This app is turned off by Group Policy. Unfortunately, sometimes it can’t do its job because of various errors.
Microsoft’s built-in antivirus, Windows Defender, is used by millions of people to protect their computers. Home › Fix › Windows 10 › Errors › Windows Defender deactivated
