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After installing updates which require a reboot, the Windows 8 Power button shows "Update and Restart". What I really want is "Update and Shutdown". How can I get this option to appear? I didn't realize it even existed until I saw it on my system where only "Update and Shutdown" had been available. I gathered this happened because I did not install pending updates for a day or so. Shift/Ctrl/Alt clicking on the choices bring no new options.

There is a group policy which has been around since XP SP2 which will prevent this from showing up, but I have not found a way to force it to show whenever updates are pending. The thread No more update at shutdown? in Microsoft Community discusses this issue as well.

Digging further I found the registry key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update\Power\OfferInstallAtShutdown-Final which looks related but could not find any documentation for it. It is set to 0x28 on my system. When I changed it to 0x01 it came back after reboot as 0x28. When I changed it to 0xff it stuck after reboot but neither option changed my Power button options.

Reading Minimizing restarts after automatic updating in Windows Update I see that Install at shutdown is a popular option. Is it not offered when the updates require more work after restarting?

This superuser thread is related: How can I install updates and shut down from the command line?

[edit 9/12/2013] Using shutdown.exe /s /t 0 from the command line as suggested by @Vargas below installed the update and shut down as desired when Power>Shutdown did not. The real question remains which is how can this be done consistently through the GUI?

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The default shutdown is the is new hibernation boot and Windows needs to do a reboot to get the old Shutdown where it can install the updates. –  magicandre1981 Jan 11 '13 at 4:58
    
@magicandre, thanks for that. I read up on it in Delivering fast boot times in Windows 8 and the article mentions the new /full switch on shutdown.exe. I will see if this helps next time. –  User5910 Jan 16 '13 at 4:26
    
the full flag was removed in the CP/RP. Now the shutdown.exe does a normal/full shutdown by default. If you want the new start, you must use the /hybrid flag. –  magicandre1981 Jan 16 '13 at 11:23
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3 Answers

This probably cause in your scenario is the new Hybrid Shutdown mode offered by Windows 8. I’ve seen this happen on a system where hibernation had been previously disabled, causing some confusion when the system was upgraded with the new shutdown procedure which uses a new form of hibernation which has then failed to work.

Solution :

Open up a command prompt as Administrator and type

powercfg /H on

Hope It works for you.

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Thanks for the suggestion. I already have hibernate enabled though. –  User5910 Jan 16 '13 at 3:10
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From This question on SO, you can update and shutdown with (just tested and worked fine):

shutdown -t 0 -s -f 

It does not show the option on the menu, but does the job!

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True, this lets the update install where using Shutdown on the Power menu does not for the updates I installed today. I've updated the question to mention this, thanks. –  User5910 Sep 12 '13 at 23:45
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It appears that Microsoft has added an "Update and Shutdown" option into Windows 8.1. Hopefully it is here to stay in future versions of the operating system.

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