In Device Manager? I have had trouble with certain USB devices wanting a specific drive letter and I have had to change other device drive letters first before the uncooperating device would appear. . . Hope it helps
I have an iaudio X5L which is recognized by my computer when I plug it (the bubbles in the bottom right appear). However, it doesn't show up in my Windows Exlporer/My Computer. I did some research and thought it was just a matter of assigning a drive letter. However it doesn't show up in the disk management profile.
In the hardware profile, I can see it under the Harddrive tab along with my two other HD's.
My USB 2.0 controller is an upgrade from 1.1 ... I thought maybe it was an issue of not enough juice so I bought a D-Link USB Hub with AC adapter... still no dice.
-i upgrade motherboard drivers
-no X5L drivers to my knowledge
-canon camera connects fine