How to make an undeletable folder?

 

1) open command prompt

2) Type in directory (harddisk) notation where you want to create this folder..

 

 

3)Type md \lpt1\\ and press enter, the folder will now be created  in your E: or c: or D: drive (don't use quotations while entering folder name n use required space wherever u see it in given image)

 

Done..

Try to delete the folder u created.. you wont..

 

1) Just go to command prompt again , type the directory notation where folder is made and press enter.
2) type  rd \lpt1\\

 

press enter

 

Done............