Windows updating software for use with the website
The tool queries the Microsoft server for a file called "", which contained a list of all the critical updates released for the operating system.The tool then compares this list with the list of installed updates on its machine and displays an update availability notification.The first version of the web app, version 3, does not send any personally-identifiable information to Microsoft.Instead, the app downloads a full list of every available update and chooses which one to download and install.
The user can choose from three notification schemes: Being notified before downloading the update, being notified before installing the update, or both.
Windows XP and Windows 2000 SP3 include Background Intelligent Transfer Service, a Windows service for transferring files in the background without user interaction.
As a system component, it is capable of monitoring the user's Internet usage, and throttling its own bandwidth usage in order to prioritize user-initiated activities.
Since its inception, Microsoft has introduced two extensions of the service: Microsoft Update and Windows Update for Business.
The former expands the core service to include other Microsoft products, such as Microsoft Office and Microsoft Expression Studio.
If that one server got compromised one day, or an attacker cracks the [Microsoft] DNS server again, there could be millions of users installing trojans every hour. Unlike its predecessor, Automatic Updates can download and install updates.