引用内容：
The IE7 Installation and Availability Update was immediately made available for manual downloading and was offered to consumers and small-business users via the Windows Update service in the weeks that followed. Beginning Feb. 12, the new IE7 package will be put into the WSUS pipeline as an Update Rollup package.
http://www.pcworld.com/businesscenter/article/141472/warning_an_ie7_autoupdate_is_coming_soon.html
还不是完全到来吧？只是升级了部分用户。