Folder lock using command prompt

To lock a folder in windows XP without any software. Follow the steps below.

1. Make a Folder in any drive.

2. Now open Command Prompt. Set your Drive and Directory where you make your folder.

3. Type "attrib +s +h C:\ajay" without quotes and press enter.
(Here I make a folder in C Drive and name it a).

4. This command will make your folder invisible.

5. To make it visible again type "attrib -s -h C:\ajay".

You can lock any other folder also by changing the location C:\ajay to address of your folder.

Reference: ajaytak.blogspot.com