Build 10240 = RTM.
I'm pretty sure you do 'need' the security patches Microsoft will be releasing...
The pushback on the automatic updates is coming from people making a massive thing out of nothing. Do they think Microsoft will willingly push out updates that brake every install over night?
Do all these people have Android 1.5, iOS 1, and only ever play launch titles on their consoles as they refuse to take any updates? Actually they are probably PC gamers... playing using the drivers that came on a CD with their graphics card only, on Windows 7 RTM (non of that new fangled SP1 rubbish), using only ever the base release of any game.
Progress is bad, mmkay. Microsoft are going to brake over half the worlds computers without testing anything, mmkay.
Auto updates are a brilliant idea, because it means the 99% of all users out there who dont know what Windows Update is and haven't ever installed a patch will be have much safer machines.
having it as the default setting is fine but there needs to be choice
and not just "delay the update for a few days"
its pretty arrogant to try and tell people how they should be using their computer, which is part of the reason forcing metro on people didnt work out so well for them
if microsoft doesnt provide a super easy way to turn off all updates a 3rd party app will, just like the start menu and classicshell with windows 8
and rly....they will just get a lot of bad feeling for it