I've just spotted this on on IB Elite :-) This Windows feature notifies you when critical updates are available for your computer. This feature replaces Critical Update Notification if it is already installed. Critical Update Notification will no longer offer critical updates. Download now to receive notifications of critical Windows updates. Press Read More for further info.

News Source: IB Elite
Direct Link: Windows 2000 Automatic Updating Released
Additional Info: Neowin