I have frequent internet problems. Either you get "website unavailable", which if you hit refresh several times- sometimes resolves itself. Other times a computer restart is the only fix. Even other times, the "online" light on my modem goes off and I have to unplug the modem -- wait -- and sometimes that fixes it. How do I know if I need a new modem or if it is a software problem? I am using Internet Explorer, Vista and a Motorola modem.