Lock Folder without Software

I will show you a trick to lock the folder without any program.
Now select the folder whatever you want to lock. Lets suppose you want to lock Folder the name " Ali " in Drive D:\
Now open Notepad and type this command
ren ali ali{21EC2020-3AEA-1069-A2DD-08002B30309D}
Now save this file in Drive D with extension of .Bat (example Lock.bat)
Now you cant see the data of this folder.

If you want to unlock this folder so type this command
 ren ali{21EC2020-3AEA-1069-A2DD-08002B30309D}ali
Now save this file in Drive D with the name of unlock.bat
Now your folder come back in origional form...