Uninstall any antivirus software that might have been preinstalled. Run Windows Update and install all updates marked critical or important. Install One Care using the "add another computer" link on the One Care homepage -
http://onecare.live.com/standard/en-us/default.htm To activate One Care, select "Subscribe" and enter the Live ID and password associated with your subscription when asked for a Live ID.
Jim - MVP Windows Live - Forum Moderator - Live One Care - Live Mesh - Microsoft Security Essentials