Windows Vista Why are some services missing from the Custom Registry File Tool?

Several services states cannot be modified using a registry patch in Windows Vista. These are not listed to avoid errors while applying the patch to your system.

I have found that the following Windows Vista Services states cannot be controlled by a registry file in normal or safe mode:
  • DCOM Server Process Launcher
  • Diagnostic Policy Service
  • Diagnostic Service Host
  • Diagnostic System Host
  • Distributed Link Tracking Client
  • Group Policy Client
  • Remote Procedure Call (RPC)
  • Security Accounts Manager
  • Windows Modules Installer