How to make an undeletable folder

1) Open Command prompt

2) Type in directory notation where you want to make this folder e.g C: or D: or E: , press enter.

3)Type md \folder name\\ and press enter to create the folder.

4)You will get error message if you try to delete or rename it.

How to delete un deletable folder?

1) Just go to command prompt again , type the directory notation where folder is made and press enter.
2) type rd \folder name\\ press enter.

Eg:- md \trial\\
rd \trial\\