What's your favorite free antivirus app? Plus, Windows 7 SP1

Covering the latest in Windows downloads.

Microsoft made Windows 7's first service pack available to consumers last week. The service pack doesn't bring any new whiz-bang features for consumers, but it includes two important back-end additions that promise to improve performance in Windows 7's server counterpart, Windows Server 2008 R2. Also included in SP1 are a number of fixes for bugs and security holes, which may be useful for those who don't use the auto-update feature.

On the security side, with Avast 6 fresh out of the gate and CNET's opinion on record, it's time to ask you which of the many free security suites available is your favorite. The big three on Download.com are AVG, Avast, and Avira, although it will be interesting to see if the download counts are reflected in popularity. We aimed to have all the major players represented. Vote now in our poll and tell us your favorite.

And for the Firefox fans out there, it looks as though Firefox 4 may be in its last beta. The company hopes beta 12 will be its last for the browser's next generation, according to an updated roadmap.