Create a Password-Protected invisible folder without any software

Open Notepad(Start > All Programs > Accessories > Notepad).
Copy the following 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
echo Folder Created.
:CONFIRM
echo Are you sure you 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 the Folder :
set/p "pass="
IF NOT %pass% == YourPasswordHere GOTO FAIL
attrib -h -s "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B303­09D}"
ren "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B303­09D}" LOCK
echo Folder Unlocked Successfully.
GOTO END
:FAIL
echo Invalid Password!
GOTO END

:MDLOCKER
md Locker
echo Folder created.

GOTO END
:END
PAUSE

In the above code change Your Password Here with your own password
From the Menu bar, click on File > Save As. The Save As dialog box opens.
Under the Save as type select All Files option. Write a desired name for your file, for example Locker.bat [Remember to give a .bat extension to your file name].
Open the Locker.bat file. A folder named Locker will be created in the same location (where your locker.bat file is situated)
Open the folder and add whatever personal that you want to hide from others.
Again open Locker.bat file. Now it will prompt you a question that if you want to lock your folder or not. Reply yes with y
Now your personal Locker folder is invisible! Now you can only access your folder through the Locker.bat file
To access your folder again: Open the Locker.bat file. Now it will ask you to enter the password to unlock the folder. Enter the password. The folder will be visible.
Note: Thus you see Locker.bat file is very important (Anyone can see your password by right-clicking it and selecting Edit, so you must keep it safely in a location(e.g. your Flash drive) other than where you have created your Locker Folder. To access your folder again copy paste the Locker.bat file in the Locker folder location and then enter the password.