4010ca usb device unknown

I have a compaq R4000 tag #4010ca I reloaded win xp and my when installing mouse or any usb device i get usb unknown downloaded the driver from compaq and problem is till there can anyone help.Thanks

Drivers for the Blackberry: Not quite sure how to check this. When I plug the phone into the computer, it does not recognize it. When I go to the device manager, it comes up in the USB portion as "Unknown Device". I've tried updating the driver by pointing it to the USB driver folder in the commons files section, but it won't take.
The phone has been recognized previous for about a day, so I don't think it's firewall/security related, as nothing has changed in that realm.
The device is not in mass storage mode.
I have not tried another computer, but I have tried two completely different Tours, as my carrier was willing to replace the unit. Neither works, and this to me makes it seem obvious that it is the computer, not the phone. I've also tried multiple USB cables.

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