In Windows Vista, if this policy setting is enabled, users will not see a User Account Control window, and they do not need elevated permissions to hide, restore, or cancel updates.
If this policy setting is not enabled, users will always see an Account Control window, and they require elevated permissions to hide, restore, or cancel updates. Users will always see an Account Control window, and they require elevated permissions to do these tasks.
In an active directory environment, you can use Group Policy to define how computers and users (referred to in this document as WSUS clients) can interact with Windows Updates to obtain automatic updates from Windows Server Update Services (WSUS).
This topic contains two main sections: Group Policy settings for WSUS client updates, which provides prescriptive guidance and behavioral details about the Windows Update and Maintenance Scheduler settings of Group Policy that control how WSUS clients can interact with Windows Update to obtain automatic updates.
Users will not see a User Account Control window, and they do not need elevated permissions to install these updates, except in the case of updates that contain User Interface, End User License Agreement, or Windows Update setting changes.
(if a user is signed in to the computer when Windows is ready to restart, the user will be notified and given the option to delay the restart.) Note: starting Windows 8, you can set updates to install during automatic maintenance instead of using a specific schedule tied to Windows Update.The restart timer can be configured to start with any value from 15 to 180 minutes.When the timer runs out, the restart will proceed even if the computer has signed-in users.Note: In Windows 8 and Windows RT, this policy setting is enabled by default.In all prior versions of Windows, it is disabled by default. Specifies whether Automatic Updates accepts updates that are signed by entities other than Microsoft when the update is found on an intranet Microsoft update service location.if enabled, you must select one of the four options provided in this Group Policy setting.