MTaylor,

Have a look at this KB article for a possible clue :

Modem Attempts to Dial When Windows Starts
http://support.microsoft.com/?kbid=175312

If none of the above addresses the issue check these also :

--Windows Updates (Automatic Updates in the Control Panel) disable
Automatic Updating and see if this is the issue.
--Open Internet Options via the Control Panel. Click the Advanced tab.
Under Browsing, uncheck the box next to " Automatically check for
Internet Explorer updates ".
--Download and install either/both of these spyware programs to see if
you have unwanted "guests" phoning home :
AdAware    http://lavasoftusa.com
Spybot     http://safer-networking.org

Read the Readme and Help files of both programs to configure them best
to clean your system. Use the in-program update feature of both programs
to keep their spyware definition files up to date. Advise against using
Spybot for anything other than scanning your system for "parasites"
unless you understand what it's doing to/for your system.

MowGreen
*-343-*
Never Forgotten