Deleting the Visual Protect 3.5+ Key   If your IDM is showing fake serial notification, chances are that you have the Visual Protect 3.5+ key(simply, VP 3.5) in your registry. To do away with the notification, follow the below mentioned steps:-   1) Download Registry Trash Keys Finder(RTKF). Although, full version is preferred but free version is good enough to unearth this key. 2) Close and exit IDM completely. 3) Swtich off your internet i.e. go in offline mode.