I just did a custom i5 build for a client, running Vista 32bit. He has an external Freeagent 1Tb Drive that is getting the "USB Device has malfunctioned..." error and comes up as an unkown device under device manager. This drive works fine in other systems running the same OS, but just not on this one. All other USB devices work as should when they are plugged in. The drive has its own power source, and have tried all USB ports on machine including a hub. The board is an EVGA P55, so there is no legacy options. Have tried unplugging all USB's but the external harddrive, and still no luck. Always comes up with error when plugged in. Have also deleted all the USB related files in the 'inf' file, and rebooted, but still no luck. Any suggestions? Any help would be greatly appreciated!!