This is driving me mad... I have the same issue.
Clean installation of Windows 7 RC1 x86, was fine for a few days, now just over and over and over again, i get this "USB Device not Recognized"...
I have 6 usb ports, only 2 are used, and it recognizes my Keyboard and Mouse by name, and they function properly.
In my device manager I show 7 Universal Serial Bus Controllers
Standard Enchanced PCI to USB Host Controller
Standard OpenHCD USB Host Controller
3 Unknown Devices
USB Composite Device
2 USB Root Hubs
I don't care if the unknown devices ever work, to tell the truth...
How do i get rid of the alerts popping up all the time?