1.Open administrative command prompt/ CMD.
2.Go to your pen-drive drive letter. Suppose your USB disk is D:.
Type D: and press Enter
3.Now type the below command to remove system file, hidden read-only attribute
attrib -s -h -r /s /d *.*
4.Delete Autorun.inf from USB – Disk.
5.This makes all files visible and you are now able to delete them.
el *.lnk
6.Now to remove the shortcuts from pen-drive , Check the size of any One or Few Shortcuts, all be same.
7.Delete suspicious files, on errror check task manager for process with same name or any suspicious process and end it.
8.Open Explorer and right Click on Pen-drive ,
Click Open.
9.Search with Advance Search for all files of same size in Pen-drive.
10.Select All and press Delete.