This article was previously published under Q298439
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IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows Registry
Note Only use the method that is described in this article when you cannot remove the Microsoft Message Queuing, also known as MSMQ, 2.0 components by using the Add/Remove Windows Components tool.
This article describes how to manually remove the necessary Microsoft Message Queuing, also known as MSMQ, 2.0 components so that you can perform a clean re-installation of Message Queuing 2.0 without any conflicts with a previous installation.
NOTE: It is very important to back up the computer before you perform the following steps. Failure to do so may result in the loss of critical files.
WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
Restart the computer in Safe Mode. This will permit the deletion of files without restoration by Sytem File Protection. For information on how to boot a Windows 2000 based computer in Safe Mode see section "How to Start the Computer in Safe Mode" in the following article:
Where ### represents various number values. Not all ControlSet### entries have an MSMQ entry, but remove all of those that do.
After you complete steps 1 through 5, restart the computer to complete the removal of Message Queuing 2.0.
NOTE: When you restart the computer, the MSDTC service starts and Message Queuing 2.0 is no longer displayed in the Services program in Control Panel.
With an Enterprise Administrator account, remove this computer's MSMQ object from Active Directory by using the Active Directory Users and Computers snap-in on a Windows 2000 Active Directory server. The MSMQ object is a child of the computer's object.