Hi, Jim Hong, Program Manager on UAC, here again to tell you about a new change in the UAC user experience coming in RC1. Applications that start when the user logs on and that require elevation are now blocked in the logon path.
Without blocking applications from prompting for elevation in the user's logon path, both standard users and administrators would have to respond to a User Account Control dialog box on every log on. While this potentially becomes an annoyance for administrators, it is an unusable UI for standard users who cannot drive the UAC elevation prompt without having an administrator around to provide credentials. Furthermore, we advise users to be wary of prompts that appear without them taking an explicit action -- and prompts generated at startup go against that advice.
In RC1 and later, Windows Vista notifies the user if an application has been blocked by placing an icon in the system tray and providing a notification balloon during the startup sequence.
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