In the Windows update setting in Windows 10 you will not see the menu for disabling the Windows update.
You can make disable the Windows update using another way. use the Local Policy Group Editor.
1. Press Windows logo + R to open Run dialog
2. Write: gpedit.msc then click OK or hit the Enter key.
The Local Policy Group Editor will appear.
3. Browse to the User Configuration➜ Administrative Templates➜ System. then choose Windows Automatic Updates.
4. On the next page select: Disable, then click Apply/OK
Now the Windows update is already disable.
To set back to the normal (make enable again) do the steps above, then choose Not Configure or Enable.