Lock folder without software

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}
Now save this text file as loc.bat

Create another text file and type in it
ren games.{21EC2020-3AEA-1069-A2DD-08002B30309D} games
Now 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.Press key and you will get back your original folder. try it out!!!!!!!
Important note:How to rename your text files as bat files?
Just go to my computer->tools->folder options->go to the view tab.
Now uncheck the 'Hide extensions for known file types'.Press apply.
Now rename ur text files as bat files.