Which part of maintenance are you looking for stopping? They are run from the Task Manager. If this is a part of course work to earn a degree, you would be best to use your resources in creating a Batch and GPO that runs during boot as a script.
In almost every work environment, the systems are left running 24x7, so that any updates, etc can be pushed out to them. Automatic maintenance tasks are set at say 3 am, when no one would be using the computers. You are really best to just leave well enough alone.