After the automatic (and unwanted) windows10 installation, I got an alert that the there is a problem in the windows defender and that I should enable something.
When getting into it, it opened the windows defender menu and when tring to start real-time-protection - there was an error pop-up which says "The group or resource is not in the correct state to perform the requested operation".
How bad is it? Why does it accur? How can I fix this issue? And, is it safe to return to Windows7 this way?
[Moved from Windows]