Click on OK and your automatic updates will stop after that. After that look for service running status and click the stop button.
In the general setting look for a start-up type option and select the disable option. In the properties, options select a general setting. To turn off this service you have to right-click on the service and click on the properties option. In this window scroll down and to find the windows update service and turn off it.
In the services window, you will see many types of windows services running. Then look for the options of the service.