Fixing the "red arrow" problem in component services or error 80070422

This is about an error I've got in a Windows 2012 server: in the “Component services” funcion (COM+), when opening the “com+ applications” a red arrow appears:

And when trying to open the “COM+ Applications” folder, the following error is displayed:

<WRAP center round alert 60%>

An error occurred while processing the last operation.

Error code 80070422 - The service cannot be started, either because it is disabled or because it has no enabled devices associated with it.

The event log may contain additional troubleshooting information. </WRAP>

After reading many articles describing other solutions here, here and here for instance, I've discovered what was going on in my particular case: some services have to be started.

In particular those services that must be configured to run automatically are “COM+ System Application” and “Distributed Transaction Coordinator”.