After doing a lot of searching, the only thing I can come up with, is it's got something to do with MSN Messenger and/or MSN Dialup Accelerator. Do you have MSN Messenger and does it start up when you boot up your computer? If so, I suggest you uninstall Messenger, delete it's folder, see if that clears up the problem,and if it does then reinsall it.
I'm not familiar with MSN Dialup Accelerator, but if you can, try and do the same thing, uninstall, delete the folder and then reinstall it.
As that's the only thing I can come up with, maybe someone else has something more on this.