SCCM 2012 GPO Settings

I have implemented the following

Windows Components -> Windows Update -> Configure Automatic Updates  =  Set to Disabled

System -> Internet Communication Management -> Internet Communication Settings -> Turn Off Access to All Windows Update Features = Set to Enabled

1) Would this prevent systems, specifically servers from rebooting as well ?

2) Are there any other GPO's which should be implemented or these should suffice ?


I just came across an article on the net which says setting the policies as i mentioned above also disables the client push to new systems ?

Please let me know if this is really true ?

Also if there are any other disadvantages.