It took me a bit of time to sort this one out so I thought I would pass it along in the hope that others would be spared the treasure hunt.
For those people switching from the @Home service to other services (AT&T in my case), you may notice that the proxy:8080 keeps reappearing in the Internet Options/Connections/LAN Settings dialog. The annoying symptom of this problem is that whenever you start IE, you are taken to the transition page of AT&T.
To get rid of this behavior:
- Start Menu/Run…
- Enter: regsvr32 /u ahiehelp.dll
- Click OK
- Click OK
- Say aloud: Good Riddance
You should also remove all @Home software from your system.