http://support.microsoft.com/default.aspx/kb/935796
Despite having killed some PCs, this short list of programs will
be good to look at. If you are using any of these programs, please
look around for updates.
Release of SP1 is 3 weeks starting from now. Which is just nice
the second Tuesday (Microsoft releases patches on the second
Tuesday of each month), where computers with Automatic Updates
turned on will download and install SP1.