You really should join the Microsoft Affiliate Network. Today they announced that they will give a "$3 payout for every unique US or Canadian-based download of the free trial" of Windows Live OneCare, a piece of Microsoft software that provides a firewall, antivirus and antispyware protection, online ID theft protection, backup and restore, and performance tune-ups.

Windows Live OneCare also includes home network management, printer sharing support, WiFi Security, and online photo backup (plus more).