N/A - KB909444

Microsoft is aware of reports of isolated issues after deployment with Microsoft Security Bulletin MS05-051. We are working with a limited number of affected customers to help resolve these issues.

Systems that do not have the default Access Control List (ACL) settings in the %Windir%Registration folder may experience various problems after installing MS05-051. The update helps protect against attacks seeking to exploit MS05-051, however this isolated set of issues might impact systems after installation of the update.

Based on feedback from those customers, Microsoft has published Microsoft Knowledge Base Article 909444, which addresses the issue.

We continue to urge customers to deploy MS05-051 and all recent security updates. For additional information about security updates, please visit the following Web site.

Customers who experience installation issues should contact Microsoft Product Support Services. Product Support Services in North America can be contacted for help with security update issues or viruses at no charge by using the PC Safety line (1-866-PCSAFETY). For more information about available support options, see the Microsoft Help and Support Web site.

What is the scope of the advisory?
This advisory addresses a concern about a potential issue that may be encountered after installing the MS05-051 security update on a system on which the default Access Control List (ACL) has been modified. This issue could result in unexpected behavior by applications that utilize COM objects.

What causes this issue?
This issue is caused by the modification of default Access Control List settings on the %Windir%/Registration folder. After installing the MS05-051 security update, some services and applications cannot access required system files in the %Windir%/Registration folder.

cellspacing="0" cellpadding="0" border="0">Review the Microsoft Knowledge Base Article that is associated with this advisory

Customers who are interested in learning more about this issue should review Microsoft Knowledge Base Article 909444.

Keep Windows updated

All Windows users should apply the latest Microsoft security updates to help make sure that their computers are as protected as possible. If you are not sure whether your software is up to date, visit the Windows Update Web site, scan your computer for available updates, and install any high-priority updates that are offered to you. If you have Automatic Updates enabled, the updates are delivered to you when they are released. However, you have to make sure that you install them.

WorkaroundsWorkarounds for this issue are available in Microsoft Knowledge Base Article 909444.