"I have a frustrating problem - don't we all right. Anyway, I am trying to set up an Image for del d6410 and there is one driver that doesn't seem to work correctly. It shows up sometimes as unknown device. Then when I go and update the driver it says the best driver is already installed. The Broadcom ush has a caution symbol under the control vault device. I installed the control vault manager, the control vault driver. It still didn't change the status. Then I uninstalled the USH and the "unknown device" using device manager. The driver finally looked good I said whew!. Then rebooted and now back to a caution symbol next to broad com ush. Any ideas?"Are you sure it is the Broadcom USH device that is actually showing up? Did you already install the Free Fall sensor? That one always showed up for me as Unknown Device.