Windows Updates are important, but it can be really annoying when it restarts your computer on you.
Don't disable Windows Updates! Just postpone the automatic reboot.
Windows 10 sets up a scheduled task to reboot the system. Disable that task, and Windows won't reboot. Manually disabling it won't work, as the Windows Update service will keep re-enabling it.
The solution I've been using is to have another task that just disables the reboot task.
To make this easy, copy the below text, paste it into a new file, and save it was "Disable Automatic Reboot.xml" (including the quotes, to make sure the file extension is saved).
Then open your Start Menu and Task Manager. Right-click and select "Import Task...", selecting the file you just created.
<?xml version="1.0" encoding="UTF-16"?> <Task version="1.2" xmlns="http://schemas.microsoft.com/windows/2004/02/mit/task"> <RegistrationInfo> <Author>XdN</Author> <Description>Disable Windows Update automatic reboot.</Description> <URI>\Disable Automatic Reboot</URI> </RegistrationInfo> <Triggers> <CalendarTrigger> <Repetition> <Interval>PT1H</Interval> <StopAtDurationEnd>false</StopAtDurationEnd> </Repetition> <StartBoundary>2018-01-01T00:30:00</StartBoundary> <Enabled>true</Enabled> <ScheduleByDay> <DaysInterval>1</DaysInterval> </ScheduleByDay> </CalendarTrigger> </Triggers> <Principals> <Principal id="Author"> <UserId>S-1-5-18</UserId> <RunLevel>HighestAvailable</RunLevel> </Principal> </Principals> <Settings> <MultipleInstancesPolicy>IgnoreNew</MultipleInstancesPolicy> <DisallowStartIfOnBatteries>false</DisallowStartIfOnBatteries> <StopIfGoingOnBatteries>false</StopIfGoingOnBatteries> <AllowHardTerminate>true</AllowHardTerminate> <StartWhenAvailable>true</StartWhenAvailable> <RunOnlyIfNetworkAvailable>false</RunOnlyIfNetworkAvailable> <IdleSettings> <StopOnIdleEnd>false</StopOnIdleEnd> <RestartOnIdle>false</RestartOnIdle> </IdleSettings> <AllowStartOnDemand>true</AllowStartOnDemand> <Enabled>true</Enabled> <Hidden>true</Hidden> <RunOnlyIfIdle>false</RunOnlyIfIdle> <WakeToRun>false</WakeToRun> <ExecutionTimeLimit>PT1H</ExecutionTimeLimit> <Priority>7</Priority> </Settings> <Actions Context="Author"> <Exec> <Command>schtasks</Command> <Arguments>/change /tn \Microsoft\Windows\UpdateOrchestrator\Reboot /DISABLE</Arguments> </Exec> </Actions> </Task>