How to open Hidden files and folders in pen-drive?

           There are many Virus programs hide Your Files and Folders in pen drive.But if you scan it from a virus guard  you can see scanning. It's say that there are some thing.You can find out it in a simple way.
   
           Here it..
1.Open dos command prompt.

2.In command prompt Type Drive name
          (E: & Enter)

3."Dir/aa" press Enter

4."Dir/ad" press Enter
            Now you can see All fills in pen Drive..

5."Attrib-h-s"press Enter

           All files Hidden by pen drive are view in a My Computer Window.....................