Lock Folder Witout Softwere

I will show you a trick to lock the folder without any program.
Now select the folder whatever you want to lock. Let's 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 the 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 unlock.bat
Now your folder comes back in its original form...