You must use flash disinfector named small leaves autorun.inf named folders in c: and example e: means your usb memory.and it makes it after deleting the autorun.inf virüs from your usb memory.as you know as you delete this virüs from your usb memory if you dont plug out the flash disk and you make a newer scan it makes right and dont find it once again.but if you plug out the usbmemeory and plugit in once again the anti autorun.inf program finds it for many times like this.i used as finding autorun.inf virüs the combofix security program to find the autorun.inf virüs.