Unable to edit DCOM settings for IIS WAMREG admin service on Windows Server 2008 R2

If you try to fix…

Event ID error messages 10016 and 10017 are logged in the System log after you install Windows SharePoint Services 3.0
(KB 920783)

… you will notice that you cannot change any settings in Component Services and all controls are greyed out. This is by design.

Workaround:

1. Take ownership of the registry key HKEY_CLASSES_ROOT\AppID\{61738644-F196-11D0-9953-00C04FD919C1}
2. Add permissions for you to edit the key (Full Control)

(Thanks to Wictor Wilén for the tip.)