Hey Friends,
Here's a little trick to make any file or folder inaccessible
Step 1: Goto that directory (containing target file)
Step 2: Hold Shift Key + Click Right Mouse Button -> CMD will be opened
Step 3: type- cacls (filename) /p everyone:n -> enter Y on prompt to confirm
Done, now file wont open, close, delete, rename without admin rights (It does not open with admin rights in windows 7)
To make it accessible again type- cacls (filename) /p everyone:f -> enter Y on prompt to confirm
Still confused??? Checkout this video: