Ray: Thanks for your response. After I tried everything I thought it might be a bad port but all the diagnostic software indicates the ports a working fine. I tried installing and using both the Gateway and Logitiech mice with USB and PS/2 ports with no effect. It occurs with any open window that has a vertical scroll bar. It's not much fun trying to work with an Excel worksheet when you can't get to the first 5000 rows. It's my impression that somehow the mouse drivers are "locked" in scroll down mode. I tried using the SCROLL LOCK key to no avail. I'd be interested in hearing what you have to say about real ISP providers. My wife and I are Romanians and we use the internet to communicate with family and friends in Romania, since it's cheaper and faster than a telephone. For a web-based membership management utility and information on list policies, please see http://nibec.com/24hoursupport/ To unsubscribe, send a blank email to 24hoursupport-request@xxxxxxxxxxxxx with "unsubscribe" (without quotes) in the subject.