In addition to Miltongoh's suggestion, if you change the setting within Windows Update to what the screenshot below depicts, it will only install updates when shutting down the PC, instead of during a restart.

• Proposed as answer by miltongohMVP Monday, June 15, 2015 3:23 PM

In addition to Miltongoh's suggestion, if you change the setting within Windows Update to what the screenshot below depicts, it will only install updates when shutting down the PC, instead of during a restart.

• Proposed as answer by miltongohMVP Monday, June 15, 2015 3:23 PM

Have you tried to use the command line?

shutdown /r /t 0

This trigger a reboot with "/r" and with the time "/t" set to immediate.

In addition to Miltongoh's suggestion, if you change the setting within Windows Update to what the screenshot below depicts, it will only install updates when shutting down the PC, instead of during a restart.

• Proposed as answer by miltongohMVP 15 hours 51 minutes ago

When remote trouble shooting, sometime we need to reboot the customer's computer. unfortunately the computer might deploy the updates during rebooting. as you know that the deployment may cost a lot of time, so we have to wait for a long time. is that possible to temporarily postpone the deployment of windows update?

I will mark if it helps.

Try it out and let us know your results. 

Cheers.