How to Make an Inaccessible Windows XP Folder

This wikihow will help you to ensure that you can secure data on a local Windows PC without the need for any sort of expensive software. This procedure involves using a batch program. This Batch program can be used to lock a single folder and Unlock it respectively. To lock more folders, change the games in the below batch program to the folder of your choice. Batch file is a file that can do sort of DOS commands automatically.

Steps
Suppose you want to lock the folder games in d, which has the path D:\Games.
In the same drive, create a text file and type
Ren games games.{21EC2020-3AEA-1069-A2DD-08002B30309D}
Save this text file as loc.bat
Create another text file and type in it
Ren games.{21EC2020-3AEA-1069-A2DD-08002B30309D} games
Save this text file as key.bat
Now you can see 2 batch files loc and key.
Press loc and the folder games will change to control panel and you cannot view its contents (loc.bat stands for lock).
Press key and you will get back your original folder. (key.bat stands for key to open the lock).


Tips
The Lock (loc.bat) actually renames the folder games to games.{21EC2020-3AEA-1069-A2DD-08002B30309D} . The Key renames it back to "games".
The .{21EC2020-3AEA-1069-A2DD-08002B30309D} is an example of ClassID (CLSID). Every objects on your computer identified by using these unique hexadecimal IDs. ".{21EC2020-3AEA-1069-A2DD-08002B30309D}" is CLSID for Control Panel.
Try it out with a dummy folder with files in it, first; then try it out for real.