By default, when the Workload Automation DE Web Client component is installed, no service is defined in the Windows Service Catalog. This is a manual effort and this article guides you through the process to create the service.
1) Using the Windows Command Prompt, navigate to the apache-tomcat/bin directory of the Workload Automation DE Web Client component.
2) Execute "service.bat install "CA Workload Automation DE Web Client"
3) Verify the service is added/defined as you expect to see it in the Windows Services panel.
4) Set the service to Automatic start.
5) Start the service.
Please reference https://tomcat.apache.org/tomcat-7.0-doc/windows-service-howto.html#Installing_services for details on how to manually install an apache-tomcat service on windows.