Several security bulletins updated today. Check out the details here:
Windows Security Updates Summary for December 2004
The Microsoft Windows security updates for December 2004 include several important updates and a critical cumulative update for Microsoft Internet Explorer 6 Service Pack 1 (SP1), a component of Windows. If you have any of the software listed on this page installed on your computer, you should visit the Windows Update Web site to install related updates.
The technical bulletins are also listed at the TechNet Security Bulletin Search page.