HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet contains the following keys:

• Control

• Enum

• HardwareProfiles

• Services

The first three are used by the operating system. You can edit only the Services subkey, which contains Parameters for Oracle Database Services.

• Parameters for Oracle Database Services
  HKEY_LOCAL_MACHINE\SYSTEM\CURRENTCONTROLSET\SERVICES subkey contains additional subkeys that correspond to each Oracle Database service.