MY WAYZ

1. Open run and type "cmd" (without Quotes). A command prompt window will open.






2. In command prompt, Type the following command.
  "cacls <folder path> /e /c /d %username%"









3. Press Enter


4. You are done. For check, go to the folder and double click it and see the magic.









NOTE: For undo the step (make the folder accessible again). Do this
1. In command prompt type 
  "cacls <folder path> /e /c /g %username%:f" (without Quotes)











2. Now the folder is again accesible!


Enjoy!!