After you have installed Kentico CMS web project using the Quick installation or the Custom installation, you can additionally modify its components using the Installer. You can add components which you did not install or you can remove components which you no longer need.
You can find more information about the Register performance counters for Health Monitoring and Install Windows services for Scheduler and Health Monitoring options in the Installing Kentico (Questions and Answers) topic.
The Installer now installs and uninstalls components according to your specification.
You can check the file containing the names of registered web projects at C:\ProgramData\KIM\kim.xml.