When you try to uncheck "Hide Protected Operating System Files (Recommended)" Option in Folder Options in Windows OS, you get a warning message asking for confirmation as shown in following screenshot:
How to Disable Warning Message While Unchecking “Hide Protected Operating System Files†Option in Folder Options - Tweaking with Vishal
How to Disable Warning Message While Unchecking “Hide Protected Operating System Files†Option in Folder Options - Tweaking with Vishal