I have Norton anti-virus, but for EXTRA safety, I just installed AVG anti-virus it is FREE... FREE.. FREE..and it is GOOD..GOOD...GOOD... it is easy to install and walks you gently thru all safety checks and has automatic updates if you wish...totally configurable!....

(they have a note up explaining that they are busy these days, but have added a new site for downloads!)

If you are NOT protected, do yourself a favor....