It is an amazing fact that a folder with the name "CON" cannot be created in windows xp. If you don't believe try to create it.
here I am going to share the trick with witch you can create a folder with the name "CON".
First create a folder and rename it.. Type CON and then press ALT button and type 0160 using numpad. Now release ALT button and hit Enter. DONE!!!
NOTE: you must have to type 0160 using number pad. Otherwise trick will not work.