How to stop Windows 2012 hyper V host from automatic restart due to Window update?

Just came to take this position.  
One of our hyper V hosts is giving off a message that it will do an automatic restart today due to updates, but it does not specify when though. We have about 12 critical production VMs running on this host.

I did a little bit of research and found two commands that will temporarily stop the countdown until the next manual restart:

Net stop “windows update”
Net stop wuauserv

Do you think it is safe to issue the above commands to stop the automatic restart?
Also, it is certainly not a good idea to allow the host to automatic restart so I want to stop it. Can you tell me where to find the setting?
CastlewoodAsked:
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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
Domain joined or workgroup?
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CastlewoodAuthor Commented:
domain joined. We have WSUS in our LAN.
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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
Make sure the Hyper-V server is set to download and prompt via Group Policy. Is it in the right OU?

Our GPOs are structured around system type using Client Side Targeting. Servers and DCs get set to download and prompt while desktops auto install at night.
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CastlewoodAuthor Commented:
Phillip, Thank you for the input.

You mentioned "system type using Client Side Targeting." Can you help me understand what that means?
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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
Client Side Targeting uses GPOs to delegate PCs to Computer Groups in WSUS.

The GPO specifies the name of the Computer Group that is in the WSUS Console plus GP control gets enabled in WSUS Options.

WMI filters can be used to filter on computer type, OS version, and more. Once set up they are set on the Scope tab of the GPO in the Group Policy Management Console (GPMC).
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