This is a big and voluminous area with large documentation and case studies on the metalink.
There are documented and undocumented utilities provided by Oracle.
There are some exclusive utilities that are available for Windows platform. They are
1. ORADIM this utility enable to create windows services for an Oracle Instance for the to be created database or edit the services for the existing database or delete the services for the existing database. Start and shutdown Oracle Database services
Refer to manual.
Enter one of the following command:
01. Create an instance by specifying the following options: