FIX: The configuration program for an application does not run and the RunOnceEx registry key is cleared when you restart a computer that is running Internet Explorer 7

Consider the following scenario:

• You install Windows Internet Explorer 7 on a computer.
• Then you install another application on the computer.
• The Setup program for the second application sets the RunOnceEx registry key to run a configuration program the next time that the computer starts.

In this scenario, the configuration program for the second application does not run when you restart the computer. Additionally, the RunOnceEx registry key is cleared.

When a computer has Internet Explorer 7 installed, Iernonce.dll does not process the RunOnceEx registry key.

Security update information

To resolve this problem, users must install the most current cumulative security update for Internet Explorer. To install the most current updates, visit the following Microsoft Web site: For more technical information about the most current cumulative security update for Internet Explorer, visit the following Microsoft Web site: Note This hotfix was first included in security update 928090 (MS07-016). For more information, click the following article number to view the article in the Microsoft Knowledge Base:

When you develop the application, set the No Status Dialog option of the RunOnceEx registry key.

Microsoft has confirmed that this is a bug in the Microsoft products that are listed in the "Applies to" section.

For more information about the RunOnceEx registry key, click the following article number to view the article in the Microsoft Knowledge Base: For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base: