JSI Tip 3026. Windows 2000 Certificate Authority service does not start with error (0x80004015)?

If the DCOM interface contains both RunAs and LocalService entries, the Certificate Authority service gets confused.

To resolve the problem, use Regedt32 to navigate to both (if they exist):

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppId\\{D99E6E74-FC88-11D0-B498-00A0C90312F3\}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppId\\{D99E6E73-FC88-11D0-B498-00A0C90312F3\}

Delete the RunAs entries.

Make sure the LocalService value name exists and that it is set to CertSvc.