McAfree has promotion code which one anyone can download McAfee VirusScan 2009 Plus Firewall and AntiSpyware (1-year subscription). This costs around $40 otherwise.
The free subscription sign-up period ends December 31, 2008
Go here http://us.mcafee.com/root/campaign.asp?cid=53347
Enter promo code: VSPPROMOCF
Checkout with required information which will be required for receiving free upgrades to McAfee software for the next one year.
This is compatible with Windows 2000, Windows XP and Windows Vista systems only.