Revised Question: How do I prevent Oracle 12c Database from starting on machine boot I'd posted previously about srvctl, didn't realize it was only used if a Grid Infrastructure was installed, which in my case, is not.  

Anyways, I have Oracle 12c Database installed on my Windows 8.1 pro personal machine, used for testing purposes (school work actually).  As such, I don't want it to be up every time I log into my PC.  And being forced to run SQL shutdown every time I've logged in is a hassle (I realize I could write a batch script but that's a last resort).  

I can't figure out what service is starting an Oracle Instance at boot.  Does anyone know of what does?  I've been combing through the Oracle Doc's and can't seem to find out what it is.

TL;DR:  Just trying to stop my Oracle Database from initializing on a PC boot.
You'll want to prevent the OracleService&lt;&lt;SID&gt;&gt; from starting automatically.  Assuming you used the default SID of ORCL, that would be OracleServiceORCL.

You'll likely also see a number of other services that start with Oracle that are for various other components (i.e. your listener, your MTS recovery service, etc.)  You can set all those to not start automatically if you want.  Given that those services tend to use many fewer resources, it's generally easiest to let them run to make it easier to start the database later on.