We've had a 2016 reboot on critical servers after updates! Even worse, during operating hours! We have a group policy to prevent an automatic restart of the servers if a new update(s) is available:
These settings just working fine on the 2012R2 servers, but all server 2016 restarted without administrator consent. The event log contains this entry:
The process C:\WINDOWS\system32\svchost.exe ("ServerName") has initiated the restart of computer "ServerName" on behalf of user NT AUTHORITY\SYSTEM for the following reason: Operating System: Service pack (Planned) Reason Code: 0x80020010 Shutdown Type: restart
If you set three policies in GPO
like below:
1- No auto-restart with logged on users for scheduled automatic updates installations.
2- Re-prompt for restart with scheduled installations.
3- Configure automatic updating: 3 – Auto download and notify for install.
So,
the no auto-restart with logged on users for scheduled automatic updates installations
policy behaviour changed in Windows 10/Windows Server 2016.
Policy no auto-restart with logged on users for scheduled automatic updates installations
only applies when Configure Automatic Updates
is set to option 4-Auto download and schedule the install
.
At the same time, option 4-Auto download and schedule the install
only valid if values exist for ScheduledInstallDay
and ScheduledInstallTime
.
So, although you have configured to not re-start when there are log on users, automatically re-start will still happens at scheduled time.
Below are relate articles, just for you to have an further understanding.
https://docs.microsoft.com/en-us/windows/deployment/update/waas-restart
https://msdn.microsoft.com/en-us/library/dd939844(v=ws.10).aspx
Pejvak you can choose option 2 for Configure automatic updating
According to this link to solve the problem too.
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