You probably have chosen (or the default was chosen for you) options for
auto updates of certain software, or maybe you have adware/spyware/scumware
on your system that's trying to autodial. The following was posted by
Michael Solomon MS-MVP:
"Open Control Panel, open Internet Options, go to the Connections tab and
place a check next to Never Dial a Connection.
If the issue continues:
First, be sure your antivirus software has the latest definitions and run a
virus scan.
Second, download, install and run Ad Aware:
www.lavasoftusa.com
Note: you should always be well backed up before running an application of
this type.
Make sure your e-mail client isn't set to check for messages at specified
intervals, check the options of the applications you have installed,
especially antivirus as they may have an option enabled to automatically
check for updates. If you have Real Player installed, if you do a default
installation, you enable options for it to go online looking for updates and
news.
If you have auto-update enabled in XP that might be the issue. Open Control
Panel, open System, go to the Automatic Updates tab, place a check next to
"I don't want automatic updates" and click apply and ok."