I operate an IBM clone, P3-866 with Win98SE. I have an ADSL modem and a Smartmedia drive connected by USB in addition to a 4 port self powered USB hub as the only appliances connected by USB. Periodically, while I am online, my pc turns off all the USB ports. There appears to be no pattern to the turning off of the ports. It may happen once in a session or several times in succession. The only way to re-establish the ports is to restart the pc. It can be quite maddening. I have attempted to uninstall the ports in safe mode, allowing Windows to re-install the ports upon boot-up. This has not helped. Please advise.