http://support.gateway.com/s/Manuals/Mobile/8510913.pdfthis shows the user guide But I did not see anything for USB specific trouble shooting.
Other wierd things I have sceen...check ALL USB ports to make sure that they are not broken or have something stuck in them and are shorting out, can cause a MB functions to expire. Try a lighted item in the ports, is the say USB mouse lighting up? If so then this is a software issiue.
Turn off all usb functions and try rebooting then turn off and try them again only turn them on this time. You mentioned that you checked bios setting but did you also check to see if the bios needed upgraded?
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