During the installation of MOSS 2007 I quite often encounter the following error message in the Windows Event Viewer:

The application-specific permission settings do not grant Local Activation permission for the COM Server application with

CLSID {61738644-F196-11D0-9953-00C04FD919C1}

to the user <serverName>\mossService SID (S-1-5-21-<serviceSID>). This security permission can be modified using the Component Services administrative tool.

After searching the web and testing i found that the permissions on the DCOM+ Component Service, specifically the IIS WAMREG Admin Service, to be wrong.

To correct this:

- Copy the GUID part from the event viewer message, in this example {61738644-F196-11D0-9953-00C04FD919C1}

- Start regedit and select the most upper location of the registry tree

- Open the Edit menu and select Find. Paste the GUID in the Find what: field en select Find Next

- The search will stop at a registry entry. In the right pane an application name is referenced for the GUID, in this example it was IIS WAMREG Admin Service

- Open the Compnent Services (Start -> Administrative Tools -> Component Services) en open the following tree: Component Services -> Computers – My Computer -> DCOM Config

- In the list of DCOM objects scroll down until you find IIS WAMREG

- Click on this object with the right mouse button and select Properties

- Select the Security tab

- Make sure that the option Customize is selected under the Launch and Activiation Permission paragraph

- Click on the Edit button

- Add the service account that is mentioned in the event viewer message to the list of Groups or user names

- Give this account the Launch, Activate, Remote Launch and Remote Activate permissions

- Click on OK and again OK to confirm your changes and close the Component Services application.

- Restart IIS (iisreset or reboot) and your done. No more error!

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