A bit embarrassed at this question but here we go. After many years of using internet at work, finally connected at home. Foolishly decided to have a look at some adult sites. Didn't sign up for anything but now every time I attempt to connect to my broadband ISP my username has changed. I type in the proper username and password and connect OK but if left unattended for a short period, connection drops out and when I try to re-connect the incorrect username again appears and I have to re-type my proper username and password. What can I do?