“The new beta release of Windows AntiSpyware includes a number of enhancements that Microsoft says are based on user feedback. Specifically, the company improved some of the real-time protection agents, added new threat categories, and improved the stability and performance of the product. If you are using the existing beta version of the product, you can upgrade to this new release. Otherwise, it will install as a clean install.” – Paul Thurrott
http://www.windowsitpro.com/Article/ArticleID/45442/45442.html?Ad=1
You can download the update at www.microsoft.com/spyware (2/16/05)