My USB drive does not ork properly. The problem is the USB Root Hub could not be loaded by the NTKERN.VXD device loaders. The computer recommended updating the driver, which I did, but the problem still isn't fixed. Can someone help me?

Did u try to remove the USB Root Hub in Device Manager, then reboot and let it redetect ?

Yes, I just tried that. It still doesn't work properly, and I'm still getting the same reason for the problem.