You see ,the usb-disk virus is widely spread in my school and nod32 can not deal with it well. On one side,nod32 would miss some usb-disk virus. On other side ,which is most important,nod32 uslually can not prevent the usb-disk virus form been active when user try to open the usb-disk by double-click.At that time ,NOD32 only detect the file created by usb-disk virus but not the virus itself.That happens when the usb-disk virus is a variation or a NewHeur_PE.IMO,it is because file protection module of NOD32 do not perform advance heuristic during scanning a existed file by default setting. I know I can enable advance heuristic for existed files,but that will increase resource usage and lag my system. Any good idea?Or I have to run a manual scan for every usb-disk before I open it?