Remove DCOM errors from Event Viewer (Event ID: 10016)
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Basically, you need to change the registry ownership on the following two keys to 'Administrators'. This allows you to edit the IIS WAMREG dcom object:
HKCR\AppID\
HKCR\Wow6432Node\AppID\
You also need to give local activation permission of the IIS WAMREG dcom object to both the sharepoint domain service account as well as a local group called WSS_WPG.
The same process needs to be performed for another DCOM object, {000C101C-0000-0000-C000-000000000046}. This one doesn't have a name but it's the MSI install service.