hmmm er meget flov, har nemmelig lige opdaget at det kun virker på min gamle usbnøgle og ikke på den nye.
så jeg begyndte at undersøge det lidt nærmere og fandt frem til at min nye 2gb kingston havner i kategorien "enheder til flytbare medier", det gør min gamle 64mb usbnøgle ikke. den havner i kategorien "harddiskdrev"
lidt søgen i google gav mig så denne her:
http://www.microsoft.com/whdc/device/storage/usbfaq.mspxQ: What must I do to trigger Autorun on my USB storage device?
The Autorun capabilities are restricted to CD-ROM drives and fixed disk drives. If you need to make a USB storage device perform Autorun, the device must not be marked as a removable media device and the device must contain an Autorun.inf file and a startup application.
The removable media device setting is a flag contained within the SCSI Inquiry Data response to the SCSI Inquiry command. Bit 7 of byte 1 (indexed from 0) is the Removable Media Bit (RMB). A RMB set to zero indicates that the device is not a removable media device. A RMB of one indicates that the device is a removable media device. Drivers obtain this information by using the StorageDeviceProperty request.
så resaultatet må jo være at det kan sagtens lade sig gøre, når bare man har den rigtige usbnøgle.