EventReporter Event ID 103: The service control handler could not be installed#

Answer#

The service process could not register its control handler with Windows and terminates startup before normal service controls can be processed.

Event details#

Event ID: 103
Severity: Error
Component: Windows service lifecycle
Windows Event Log source: Adiscon EvntSLog
Available since: Current supported versions; original introduction not recorded
Message pattern: The control handler could not be installed.

Possible causes#

The executable was started outside the Service Control Manager instead of as the registered Windows service.
Windows rejected handler registration because the service process or registration state is invalid.
A Windows service-control failure occurred during very early startup.

Immediate checks#

Start the product through Windows Services or Start-Service, not by launching the service executable interactively.
Check neighboring Service Control Manager events and the registered executable path.
Repair the product installation if the service registration points to the wrong executable, then perform one controlled start.

Detailed procedures#

Verify service state, dependencies, and service account — Confirm service state, start mode, dependencies, account, and SCM errors.
Collect an Event ID and neighboring product events — Preserve the complete event and the product events immediately before and after it.
Export configuration and collect a bounded debug log — Create a text configuration export and time-bounded debug capture, then disable debugging.

Verify the result#

Confirm that Windows reports the service as Running and that normal stop and start controls work without Event ID 103.

Evidence to collect#

The complete Windows Application Event Log entry, including all event detail.
The product name, exact version, service account, and event timestamp with time zone.
A configuration export and debug log covering the same time window, with secrets removed.

Escalation#

If the event continues after the detailed procedures, collect the listed evidence and contact Adiscon Support.