I get a "USB Device not recognized error" popping up every few seconds (it's gotten much frequent over the last few days) for no reason. I have no USB devices connected, as far as I can tell. connect/disconnect, repeat. I suspect it may be the bluetooth card (dell internal bluetooth) since that's stopped working lately. Anyone know what the cause is and how I can fix it? This is a new Dell 600m running Windows XP Pro SP2.