running windows xp sp3, i've been having issues with this for months since i first started using arduino uno, on my dell laptop, dell desktop, and hp laptop i can't have the motorola razr tethered usb for internet and the arduino hooked up at the same time on different usb ports, whichever one is hooked up first will block the other so the first has to be unplugged to get the other to run or vice versa and so on, i've tried to manually set the com ports to razr on com5 which liked com3 before and arduino to com3 that it normally uses with no luck, any ideas would be helpfull ty