Apr 2004 Microsoft Security Bulletin:

• MS04-014: A buffer overrun vulnerability exists in the Microsoft Jet Database Engine (Jet) that could allow remote code execution. An attacker who successfully exploited this vulnerability could take complete control of an affected system, including installing programs; viewing, changing, or deleting data; or creating new accounts that have full privileges. (KB837001) - All Windows OS.
• MS04-013: Cumulative Security Update for Outlook Express.  This update addresses an issue when copying music media files between Windows Media Player and a supported portable device. As the number of items in the Media Library increases, so does the copy time. You can help improve the transfer time by installing this update. After you install this item, you may have to restart your computer. (KB837009) - Outlook5.5 & Outlook6
• MS04-012: Cumulative Update for Microsoft RPC/DCOM.  A security issue has been identified that could allow an attacker to compromise a computer running Windows and gain control over it. You can help protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer.  (KB828741) - All Windows OS.
• MS04-011 - Security Update (Remote Code Execution) for Microsoft Windows, Windows LSASS Buffer Overrun Vulnerability.  This update fixes at least 14 security flaws. A security hole in the Help and Support Centre affects both Windows 2003 and Windows XP. Another flaw in the Windows Meta File image format could allow an attacker to create a digital picture file that could take control of a Windows NT, 2000 or XP computer. At least six of the 14 flaws could result in a remote user taking control of a Windows computer.  (KB825732)  - All Windows OS.