You probably want to address the infection first.
Use the free online scanner -
http://onecare.live.com/site/en-us/default.htm
Once the PC has been cleaned, install OneCare trial from http://onecare.live.com and click subscribe after the reboot. Then sign in with the LiveID used to activate your subscription on the first PC.
Run a full scan with OneCare. If the infections are not removed/detected, contact support for help with removal/cleaning.
How to reach support (FAQ) - http://social.microsoft.com/Forums/en-US/onecareinstallandactivate/thread/30400b52-7f26-4ba0-bc18-17e305329d90
If you are in North America, you can call 866-727-2338 for help with virus and spyware infections. See http://www.microsoft.com/protect/support/default.mspx for details. For international information, see your local subsidiary Support site.
-steve
Microsoft MVP Windows Live / Windows Live OneCare, Live Mesh, & MS Security Essentials Forums Moderator
