Occasionally, whenever I safely remove hardware usb, and try to connect the USB again, it will not run. I have to then reboot for the usb to detect again. What could be the problem? I think it started happening after I inserted a USB drive and it malfunctioned creating a conflict? I tried removing all the usb controllers in Device Manager (except for the VIA controllers) and started over, but I guess the problem still exists. Can anyone help?