Several services states cannot be modified using a registry patch in Windows 7. These are not listed to avoid errors while applying the patch to your system.
All services that have the ability to be installed or uninstalled via Add/Remove Windows Components are not listed. This is in an effort to not break existing configurations.
I have found that the following Windows 7 Services states cannot be controlled by a registry file in normal or safe mode:
Welcome Guest!
"Have you tweaked your OS lately?"
Choose the look:
Windows Service Configurations!
Includes explanations of each service and advice on which services you can safely disable.