SiteAdvisor doesn't protect you from viruses. It only tells you if a website may be malicious.
If you need advice on protection against viruses/trojans/worms etc you will have to post a new thread in "
Virus Discussions & Removal Assistance" along with much more information as follows:
Please include the following information: What is your operating system, service pack and are you up to date with Microsoft update? There are two ways of checking this. Go to Start/Run and type in winver then click the Enter key. Or, right-click My Computer in the Start Menu or on your desktop (or Computer in Vista) and select Properties.
Post what it says.
What McAfee products do you have? If your taskbar icon is like this:

- right-click it and go to each application "About" and post the details.
If it is like this:

- double-click to open SecurityCenter and then click "View Details" or "About" at the lower right of the new window. Post the details from each module.