.USB Virus Scan is very use full tool to protect our computers   from virus, spy wares,Trojans  and many other software that harms our computers and become couse window corrupt .Big source of spreading such kind of harmful software are Flash Drive, Memory Card, and other removable media . Software creates (Autorun) File in Flash drive,Memory Cards .when we attach flash drives or memory card .and then because of (Autorun) script harmful program opens automatically. made changes in window Registry files or  made other changes in our computer’s System file .To get ride from this problem this is vary use full utility when this virus scan utility will be active . when you attach any flash drive, Memory cards, or other removable memory . Then this software will scan that flash drive and if that flashs drive haves any virus . That virus will be deleted by this usb virus scanner automatically.