Microsoft KB Archive/942198

= A user who does not have administrative credentials cannot install an ActiveX control when the CoGetClassObjectFromURL function is used on a Windows Vista-based computer, even if ActiveX Installer Service is enabled =

Article ID: 942198

Article Last Modified on 10/19/2007

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APPLIES TO


 * Windows Vista Enterprise 64-bit Edition
 * Windows Vista Home Premium 64-bit Edition
 * Windows Vista Ultimate 64-bit Edition
 * Windows Vista Business
 * Windows Vista Business 64-bit Edition
 * Windows Vista Enterprise
 * Windows Vista Home Premium
 * Windows Vista Ultimate

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Important This article contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:

322756 How to back up and restore the registry in Windows XP and Windows Vista



SYMPTOMS
Consider the following scenario. You develop an application that calls the CoGetClassObjectFromURL function to install an ActiveX control. On a Windows Vista-based computer that has ActiveX Installer Service enabled, a user who has the typical user rights and the typical permissions runs the application. In this scenario, you expect that the user can install an ActiveX control. However, the user is prompted to enter administrative credentials when the user tries to install an ActiveX control. Therefore, a user who does not have administrative credentials cannot install an ActiveX control.



Hotfix information
A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites
No prerequisites are required.

Restart requirement
You must restart the computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other previously released hotfixes.

Registry information
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

To enable this hotfix, follow these steps:  Click Start, type regedit in the Start Search box, and then press ENTER. Locate the following registry subkey, and then click the following registry subkey:

 On the Edit menu, point to New, and then click Key. Type FEATURE_WEBOC_AXIS_SUPPORT_KB942198, and then press ENTER. On the Edit menu, point to New, and then click DWORD Value. Type *, and then press ENTER. On the Edit menu, click Modify.</li> Type 1, and then click OK.</li> Exit Registry Editor.</li></ol>

File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Windows Vista, 64-bit version
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STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.

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MORE INFORMATION
For more information about the CoGetClassObjectFromURL function, visit the following Microsoft Developer Network (MSDN) Web site:

http://msdn2.microsoft.com/en-us/library/ms775083.aspx

The ActiveX Installer Service (AxIS) is an optional component in Windows Vista. Administrators can use this component together with Group Policy to determine which ActiveX controls users who do not have administrative credentials can install.

For more information about the ActiveX Installer Service in Windows Vista, visit the following Microsoft Web site:

http://www.microsoft.com/technet/technetmag/issues/2007/07/AxIS/default.aspx

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

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kbfix kbqfe kbpubtypekc kbexpertiseadvanced kbhotfixserver KB942198

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