The above link did not help. When I go into device manager I find "unknown device" Under the Universal Serial Bus Controllers. When I right click on the tab and do a driver update it comes back with best driver available. Everything attached to my PC is working fine. If I try to plug into a certain 2 usb ports nothing happens. I get an error message saying it doesn't recognize what is pluged into it. That's why I'm leaning towards a MB issue. Any ideas of what to look for when I open the case?