I have been trying to figure this out for a while now, and maybe somebody will have some suggestions. I have a Biostar M7vig-400 socket A motherboard with the KM266PRO chipset, and XP Pro SP2. I have about 4 flash drives that just will not work with this board. When I plug them in all i get is a blinking light on the flash drive. Sometimes Windows will load the drive, but cannot read it. This happens on all 4 USB ports that I have. I have a few other things connected that work just fine (printer, camera, etc.) But when I installed a USB card the drive works fine. I have tried to install driver after driver, different ports, turn off power save, remove all other USB devices but to no avail. Does anybody else have any suggestions?