I've had a USB modem for about 1 year now working fine, all of a sudden I keep getting an error message saying the 'USB device has malfunctioned and exceeded power limits'. The USB does just nor work anymore and therefore I cant connect to the internet. I've read posts telling me hot to get rid of this message but this doesn't help me reactivating the USB port. How come it can work fine for a year and then just stop working completely.