i have this problem since i first connected the cable modem via usb. whenever i connect the modem via usb my monitor image starts bouncing. of course, i installed driver first. i suppose that motherboard is "partly" broken because each and every usb i connect to my computer stops working after about 15 min (they don't get broken, i just have to reconnect them - but this can get really frustrating with mouse and keyboard).
any suggestions how to fix this, or i have to buy new motherboard?