When I insert any flash drive into my system a new usbdriver.exe file is automatically inserted on the drive and the icon for the file is porn. Bitdefender can't find a thing on the Win 7 Pro system. I believe the startup process associated with recognizing the flash drive and initializing it in the file system has a virus. Any ideas on how to fix it? Placing a startup.ini file with a custom icon on the flash drive doesn't fix it.