STEP 1: TYPE CMD IN THE SEARCH BAR

STEP 2: RIGHT CLICK ON CMD AND RUN AS ADMINISTRATOR

STEP 3: AND CLICK YES ON THE DIALOG BOX

STEP 4: FIRST GO TO THE DIRECTORY YOU WANT TO CREATE AN UNDELETABLE FOLDER.

STEP 5: THAT IS TYPE THE DIRECTORY: (FOR EXAMPLE SELECT THE DIRECTORY “D” THEN TYPE “D:” IN CMD) AND PRESS ENTER.

STEP 6: NOW TYPE “md con\” AND PRESS ENTER.

STEP 7: SEE IN YOUR SELECTED DIRECTORY, THE FILE WILL BE CREATED WITH THE NAME “con”.

STEP 8: THIS FILE WILL NOT BE DELETED, RENAMED AND MOVED.

STEP 9: TO DELETE THE FOLDER THEN AGAIN GO TO CMD ANDTYPE “rd con\” AND PRESS ENTER.

STEP 10: THEN THE FILE WILL BE DELETED.