HEY MY DEAR FRIENDS IT IS GENERALLY HAPPEN WITH US WHEN WE INSERT OUR PENDRIVE WE GET VIRUS INFECTED FOLDER ...........
SO HOW TO EXTRACT  ANY FOLDER WHICH IS GET INFECTED BY  VIRUS AND HIDDEN?
(1)OPEN YOUR PENDRIVE . SUCH  AS IT IS SHOWING AS  REMOVABLE(H:) DRIVE
(2)THEN OPEN YOUR  COMMAND PROMPT WINDOW.
(3)CD\
(4)THEN TYPE  H:  (DIRVE OF YOUR PENDRIVE AS ABOVE  H:  AND PRESS ENTER.)
(5)THEN TYPE    ATTRIB -R -S -H   FOLDERNAME (example   attrib -r -s -h  om).

actually virus  done the revers act of above command just   see  it  is like thAT:
ATTRIB +R +S +H  OM.