we have plan to install Windows updates in production SharePoint farm 2013, which services and functionalities these updates will impact mostly and how we plan for Windows updates in SharePoint 2013
You should check with corresponding KB articles for the update, what fix include in it and which module it will touch. i.e check this KB
Now for SharePoint, we never enabled the automatic updates for windows but we plan it. Typically, we do the following things
- Stop the SharePoint Timer and Admin services.
- Unshceudle our Search Crawl
- Stop the Profile Sync.
- Stop the IIS
Now apply the updates and then start the service and test it. Yes we perform this in our qa farm 1st.