Lock your folder without any software

You can lock your folder without using any software.Its work in Windows Xp
Vista and Windows7.
Follow these steps.

Step 1: Make a folder in C drive and rename is as "123"(You can use any name
            or any partition)

Step 2: Open "command prompt"
            (Start > All programs > Accessories > command prompt)

Step 3: Type "attrib +s +h C:\123" without quotes and press enter
           ( You can lock any other folder also by changing the location "C:\123"
            to address of your folder. )

Step 4: Now you can see what happened to your folder.
            This command will Make your folder invisble

Step 5: To make it visible again type "attrib -s -h C:\123"
            (If you  Select another location change this "C:\123") like same to step3

Done.Enjoy it.