Microsoft KB Archive/184208

= SMS: RCHELP Service Not Removed If Video Acceleration Is Disabled =

Article ID: 184208

Article Last Modified on 10/27/2006

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APPLIES TO


 * Microsoft Systems Management Server 1.2 Service Pack 3

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This article was previously published under Q184208



IMPORTANT: This article contains information about editing the registry. Before you edit the registry, make sure you understand how to restore it if a problem occurs. For information about how to do this, view the "Restoring the Registry" Help topic in Regedit.exe or the "Restoring a Registry Key" Help topic in Regedt32.exe.



SYMPTOMS
When you install Microsoft Systems Management Server version 1.2 Service Pack 3 (SP3), a new Remote Control Video Helper service, Rchelp.sys, is installed. This service assists with the Remote Control acceleration driver and is normally installed by default for all clients that are running Microsoft Windows NT regardless of whether their driver is actually accelerated.

If the "Install Accelerated Screen Transfer on Windows NT Clients" option is not selected in Client Properties, Client Configuration Manager marks the Rchelp.sys file for deletion when the client restarts. The file is removed from the client, but the service entries in the client's registry are not removed and remain configured to start.

When the Windows NT client restarts, the following message is displayed:

At least one service or driver failed during system startup.

Use Event Viewer to examine the event log for details.

An Event 7026 is recorded in the client's Windows NT Event Viewer system log.



CAUSE
This occurs because the Client Configuration Manager service does not remove the RCHELP service from the client's registry, even though the file is removed. Running Upgrade.bat does not correct the problem.



WORKAROUND
WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys And Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe. Note that you should back up the registry before you edit it.

To work around this problem, leave the remote control video acceleration enabled, or manually change the registry key on the Windows NT client.

 Start Registry Editor (Regedt32.exe).  Find the following registry key:      HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\rchelp  Change the Start value to 4. This disables the service, which prevents it from loading during startup. Quit Registry Editor.

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STATUS
Microsoft has confirmed this to be a problem in Microsoft Systems Management Server version 1.2 Service Pack 3. A supported fix is now available, but has not been fully regression- tested and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft recommends that you wait for the next Service Pack that contains this fix. Contact Microsoft Technical Support for more information.

Additional query words: prodsms

Keywords: kbhotfixserver kbqfe kbbug kbpending KB184208

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