Remove virus from USB devices

We all know the famous saying "Prevention is better than cure" the same applies to computers as well.
Now am going to tell a trick to identify whether a pendrive is infected and how to remove the infection through dos prompt.
 Whenever you plugin  USB drive in your system, a window will appear asking us to press ok or cancel.
Don’t click on Ok , just choose ‘Cancel’. Open the Command Prompt by typing ‘cmd‘ in the run box. In the command prompt type the drive letter: and press enter . Now type dir /w/a and press enter.
This will display a list of the files in the pen drive. Check whether the following files are there or not
Autorun.inf
Ravmon.exe
New Folder.exe
svchost.exe
or any other suspicious Exe file
If any of the above files are there, then probably the USB drive is infected. In command prompt type attrib -r -a -s -h *.* and press enter. This will remove the Read Only, Archive, System and hidden file attribute from all the files. Now just delete the files using the command del filename. example del Ravmon.exe. Delete all the files that are suspicious. To be on a safer side, just scan the USB drive with an anti virus program to check whether it is free of virus or not. Now remove the drive and plug it again. In most of the cases, the real culprit turns out to be the “Autorun.inf” file which mostly gets executed when someone clicks Ok in the dialog window which appears above. Thus the infections can spread.