undeletable folder

in cmd change ur directory 2 any place u like now type md ipt1\ & enter. now try to delete or rename

nameless folder2

rename a folder as 99999999 by holding alt. now leave alt and press enter

nameless folder1

create a folder and rename it as 0160 by holding alt. now release alt & press enter

nameless folder

create a folder and rename it as 255 by holding alt. now release alt and press enter