11 September 2021 Uncategorised Open the Settings app in Windows 10. I closed registry editor & was able to open Windows Defender. A registry key can be thought of as being a bit like a file folder, but it exists only in the Windows Registry. Though the Windows Defender GUI is pretty easy to use, you can also use the Windows Defender via command prompt. txt Posted: (3 days ago) Turn ON or Enable Windows Defender. Monthly updates are installed in addition to major Windows 10 releases. Go to System - Update & security as shown below. Windows defender passive mode registry key