The Microsoft Windows security update for December 2004 is a cumulative security update that resolves a newly discovered issue in 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 the related update. Affected Software:

? Microsoft Windows NT Server 4.0 Service Pack 6a
? Microsoft Windows NT Server 4.0 Terminal Server
Edition Service Pack 6
? Microsoft Windows 2000 Service Pack 3 and Microsoft Windows 2000 Service Pack 4
? Microsoft Windows XP Service Pack 1
? Microsoft Windows XP 64-Bit Edition Service Pack 1
? Microsoft Windows 98, Microsoft Windows 98 Second Edition (SE), and Microsoft Windows Millennium Edition (Me) ? Review the FAQ section of this bulletin for details about these operating systems.

Non-Affected Software:

? Microsoft Windows XP Service Pack 2
? Microsoft Windows XP 64-Bit Edition Version 2003
? Microsoft Windows Server 2003
? Microsoft Windows Server 2003 64-Bit Edition

Windows Security Update for December 2004