No error message on boot with the device disabled. As soon as I re-enable the device in devmgr, the 'device driver installation' dialogue appears in the system tray, and a few seconds later, it fails. Screenshot attached. (Enable) Uhhhhm... THIS is weird! A few seconds ago I was just looking in my device manager, and the firewire port DISAPPEARED! No joke, screenshots attached. Nothing shows up under "ghost" or "show hidden" files either. =( One second I was looking at it, then screen refreshed and it was gone before my eyes. Reloading device manager didn't change anything. (Disappear, expanded 1 & 2) Rebooting did cause it to reappear. On a whim I went to device manager, right clicked the firewire port and selected "update drivers," and let Windows 'search automatically for most up to date driver.' Apparently Windows thinks my driver is up to date and working properly. Screenshot of that attached, too.