how to lock a folder without using any software in xp!

[Admin]

*Copy the following codes (Marked in blue colour):

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 paste it in notepad.
* Change the "type your password here" with your password (Marked as bold in the above posted matter).
* Save it as batch file(with extension .bat).Any name will do.
* Now you see a batch file. Double click it to create a folder locker.
* A new folder named Locker would be formed at the same location.
* Now brings all the files you want to hide in the locker folder.
* Now double click the batch file to lock the folder namely Locker.
* If you want to unlock your files,double click the batch file again and you would be prompted for password.Enter the password and enjoy access to the folder.