What you have is a grayware, infection target are dial up user.
This dialer can be installed with or without a user's consent. It performs its dialing activities without a user's knowledge.
Upon execution, it drops the following file in the Windows system folder
if you are using onecare please proceed to create a support log in order to identify the file causing this report
Now to identify the issue:
Open Windows Live Onecare Console>
click on change Onecare settings>
click one Logging Tab
click the button create support log
now an Internet Explorer would open up
It is indicated on this window
Support Log Created
now click on the Virus and Spyware protection link all in blue
now from there it would indicate what was missed / cleaned or so failed to quarantine
please advise us of the result by posting it here
Thanks