HOW TO LOCK A FOLDER (Without using a third party software)

1)Download WINRAR.

2)Right click on mouse button and select New Folder and then       click on WINRAR Archive.

3)A new WIINRAR Archive is created on the screen.Double           click on it.A dialog box appears.

4)Drag and Drop files(which you want to hide) into that box .

5)Now Right click on any file in the box which you want to hide and select SET DEFAULT PASSWORD option.

Now set your password and enjoy ,your data remains safe and protected within your computer.