1. Start--> Run --> Notepad and hit enter.
 2. Now Copy below code and paste it in notepad  
 cls
 @ECHO OFF
 title Folder Locker
 if EXIST "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}" goto UNLOCK
 if NOT EXIST Locker goto MDLOCKER
 :CONFIRM
 echo Are you sure u want to Lock the folder(Y/N)
 set/p "cho=>"
 if %cho%==Y goto LOCK
 if %cho%==y goto LOCK
 if %cho%==n goto END
 if %cho%==N goto END
 echo Invalid choice.
 goto CONFIRM
 :LOCK
 ren Locker "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}"
 attrib +h +s "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}"
 echo Folder locked
 goto End
 :UNLOCK
 echo Enter password to Unlock folder
 set/p "pass=>"
 if NOT %pass%==type your password here goto FAIL
 attrib -h -s "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}"
 ren "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}" Locker
 echo Folder Unlocked successfully
 goto End
 :FAIL
 echo Invalid password
 goto end
 :MDLOCKER
 md Locker
 echo Locker created successfully
 goto End
 :End
  Now Save Notepad as FolderLock.bat.
 3. Now double click on FolderLock.bat file then a new folder named as Locker is created.
 4. Save your files in Locker folder then again double click on the FolderLock.bat, a prompt is displayed.
 5. To lock the folder(Locker) press "y " in the prompt, to unlock press "n"  in the prompt.