Microsoft's Advertising Framework
This says it all, really:An advertising framework may reside on a user computer, whether it's a part of the OS, an application or integrated within applications. Applications, tools, or utilities may use an application program interface to report context data tags such as key words or other information that may be used to target advertisements. The advertising framework may host several components for receiving and processing the context data, refining the data, requesting advertisements from an advertising supplier, for receiving and forwarding advertisements to a display client for presentation, and for providing data back to the advertising supplier. Various display clients may also use an application program interface for receiving advertisements from the advertising framework. An application, such as a word processor or email client, may serve as both a source of context data and as a display client. Stipulations may be made by the application hosting the display client with respect to the nature of acceptable advertising, restrictions on use of alternate display clients, as well as, specifying supported media.
In other words, every app running on Microsoft's advertising-enhanced OS will spy on you so that those nice advertisers can push junk in your face. Thanks, Microsoft. (Via Slashdot.)