Please don’t use this method if you are unsure what you are doing, I am not responsible for any damage caused by use of this, though it won’t occur if you follow my steps correctly.

Here we start:
Open Notepad from your Start -> All Programs -> Accessories -> Notepad

01. Copy and Paste the below code in Notepad and Save it as FolderLock.bat

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

02. Now Double Click that new Batch file named FolderLock and it will make a new folder namedLocker in the same location:

Now put the Data Inside the folder Locker and again Double Click the Batch file to Lock it, this will give you a prompt, just Type y and press Enter:

To Unlock the Folder just double click the Batch file again and type y and press Enter.

Now keep the Batch File named FolderLock.bat in a different place like your USB Pen Drive so that only you can access the Folder you have locked.

Hope this helps. If you have any question or doubt, please leave a comment and I will get to you as soon as possible and will help you to best possible way.