Microsoft will also provide a Blocker Toolkit for its enterprise customers who may want to block automatic delivery of IE7 in their organizations; this blocker has no expiration date. Enterprise customers can download the free Blocker Toolkit from the Microsoft Download Center today.
Alternately to using the AU feature, users will be able to visit the Windows Update or Microsoft Update sites and obtain IE7 by performing an Express scan for high-priority updates.
The installation of the IE7 will preserve users' current toolbars, home page, search settings, and favorites and installing will not change their choice of default browser. Users w will also be able to roll back to IE6 at any point by using Add/Remove Programs in the Control Panel. Finally, users who have AU turned off will not be notified.