A COM client application no longer runs as expected on a Windows XP SP2-based computer, and you may receive the following error message: "E_ACCESSDENIED"

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On a Microsoft Windows XP Service Pack 2 (SP2)-based computer, a Component Object Model (COM) client application no longer runs as expected. Specifically, the COM client or server process is unusable. Additionally, the COM client may receive the following error message:
This problem occurs if the client or server process is removed from an internal table in the Rpcss.dll file.

Hotfix information

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

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


You must have Windows XP SP2 installed to install this hotfix.

Restart requirement

You must restart your computer after you apply this hotfix.

Hotfix replacement information

This hotfix replaces the hotfix in the following Microsoft Knowledge Base article:
914301 The CoCreateInstance function may return an HRESULT failure on a Windows XP Professional Service Pack 2-based or Windows Server 2003-based computer

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.
File nameFile versionFile sizeDateTimePlatform
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
More information
For more information, 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
COM DCOM association lrpc rpc receivelotsacalls rpcrt4

Article ID: 916189 - Last Review: 01/16/2015 01:47:38 - Revision: 4.0

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