Get a free 6 month trial license of McAfee Internet Security (3-User license).
This is normally only a 30 day trial.
McAfee Internet Security is a comprehensive, easy to use antivirus suite with 2 way firewall, anti-phishing, parental control, website safety and comes with unlimited email and chat support.
Free download (ISP limits apply).
*Account creation required.
Only good for those signing up with new accounts? (hoping to get my subscription extended by 6 months for one of my PCs)
EDIT: works for those already using mcafee who have accounts there - log in and get 6 months free.