This is because my internet traffic is limited by ISP and it's free only during a specific period throughout the day (2:00am-7:00am). I've set windows update setting to check for updates but notify me before downloading in order to prevent it from automatically using up my traffic. But then I have to manually tell it when to start downloading.
My objective is that Windows Update runs everyday, install all available updates and (if necessary) automatically restarts the computer, giving the chance to the users to postpone it to maximum 4 hours...
I think I am almost done setting up a WSUS for our small infrastructure here, however there are still issues bothering me.
Which GPO setting should I use to force my clients to automatically i