Windows 10 Technical Preview - Change the time when Windows 10 Updates are installed. November 12th, 2014
You may notice a delay when Windows Updates or new build are installed simply because the default time for the automated process named “the maintenance window” is set for 2:00 AM in the morning.
Also: How to speed up when new builds are installed - Wiki article
If you PC is in sleep mode at this time it will wake up and install the update or updates. However if your PC is shut down (which I make it a habit of doing) then the updates may be missed or not downloaded until you load Windows and the PC has been idle for a period of time, then when you’re ready to shut down the PC you will may see a message to either “Update and shut down” or “Update and restart” your PC. A ‘Restarts’ is the better of the two choices in my opinion to complete the update. You can open the Control Panel and check the Windows Update history to see what was just or last installed.
Here is how to change the maintenance windows to a more convenient time, for me it is when I’m having dinner.
Right click on the ‘Start’ menu, select the ‘Control Panel’ option.
Next in the control Panel click on ‘System and Security’ category.
Click on ‘Windows Update’ option.
In the ‘Windows Update’ window you should see a ‘Change settings’ option on the left side, click on it, this will open ‘Change settings’ window.
About half way down the ‘Change Settings’ window, in the ‘Important updates’ box you should see a link labeled ‘Updates will be automatically installed during the maintenance window’, click on the link to open the ‘Automatic Maintenance’ window.
The default ‘Automatic Maintenance’ setting is for 2:00 AM.
To change it to a more convenient time, click on the drop down arrow and select a time that best meets your needs.
You can disable the wake up option by removing the check mark in the box labeled ‘Allow scheduled maintenance to wake up my computer at the scheduled time’.
Click the ‘OK’ button to save your changes, and again when the current window closes, then exit the control panel.
Now you can sit back and relax watching the evening news or having dinner and the updates will take place as long as the computer has been idle for at least 15 minutes.