Windows only: Ad-Aware, the hard-to-believe-it's-free spyware-cleaning app, has released a beta version that includes full support for Windows Vista and 64-bit platforms. Also included in the upcoming free version is a rootkit removal tool, faster update downloading, and an interface make-over that looks a bit more modern than the blue buttons long-time users are used to. All the ease-of-use and thoroughness that make Ad-Aware's current version part of our Lifehacker Pack of must-have downloads likely apply to this beta, as well. Ad-Aware Beta is a free download, requires a registration and email confirmation to grab.

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Windows XP/2000 only: Software firewall ZoneAlarm is offering free downloads of its basic firewall package with a spyware scanner/cleaner and a year of free updates until 5 p.m. PST today (although you'll get an email with a download link that's valid for a week after that). Program maker Check Point Software claims the free offering is made to coincide with Microsoft's monthly "Patch Tuesday" and the ensuing new vulnerabilities that hackers start working on. Regardless of the piggy-back marketing, ZoneAlarm is an easy-to-use port protector, and a little free spyware protection couldn't hurt either. ZoneAlarm Anti-Spyware is a free download for Windows 2000 and XP only.