Lock any folder using cmd it will work in win xp/win7/win8/vista

1)First of all copy tha file location  which folder you want to lock.

2)Open cmd  two mathod to open cmd  1: with start button that are provided by microsoft  in  windows.
                                                                 2: By the run, open run and type cmd and enter.


3)In cmd type  command: cacls foldername /e /p everyone:n
  at the place of foldername you have to specify the PATH NAME of folder that you want to lock

4)To open that folder type command:cacls foldername /e /p everyone:f
it will give you full access to your folder
 other command to control the permission on folder
 
5)cacls foldername /e /p everyone:R - read access

6)cacls foldername /e /p everyone:w - write access

7)cacls foldername /e /p everyone:c - change access

enjoy with computer............