To Prevent many problems caused by virus from pen drive, AutoRunExterminator is a small software that monitors all logical drives looking for the file "AutoRun.inf". If it finds a file with this name in the root of any drive, will exclude him.
When executed, the AutoRunExterminator appears in the System Tray (near the Windows clock). This means that it is open and monitoring. I recommend that you place a shortcut to the program in the "Startup" on the Start menu to start it with Windows.