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When you try to update the operating system on your computer from the Microsoft Windows Update Services Web site, Security Update for Windows (819696) may be included in the list of critical updates and service packs for you to review and install even though you have already installed DirectX 9.0b. DirectX 9.0b contains the 819696 update.
This issue may occur if either of the following conditions is true:
The DWORD value for the following Registry key is less than 4.09.00.0900:
You have an earlier version of Quartz.dll
To resolve this issue, reinstall DirectX 9.0b on your computer. To do so, visit the Microsoft Download Center.
The following file is available for download from the Microsoft Download Center:
For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to Obtain Microsoft Support Files from Online Services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.
For additional information about DirectX 9.0b, click the following article number to view the article in the Microsoft Knowledge Base:
819696 MS03-030: Unchecked Buffer in DirectX Could Enable System Compromise