* RVHost.exe or any other files with extension.
Actually this viruses are hidden and can't be seen even after
you enable show .
Following simple will change the attributes of
these files ,there after you can remove it by pressing delete
Follow these steps:
Step1.:Type cmd in Run
Step2.: Switch to the drive on which pen drive is connected
(like C:\> h: enter)
Step3.: type exactly as attrib -s -h *.* /s /d and hit enter
(don't forget spaces).
Now you can see hidden virus files and you can delete them.