"Windows Update sending private data to MS" quote:
As it turns out, packet analysis is useless, as the stream is encrypted via Secure Sockets Layer (SSL). However, using an undocumented Windows feature, tecChannel was able to get around this and view the raw data. The results were alarming. Embedded in the data stream were lists of what software you have installed on your PC--and not just Microsoft products. Apparently the folks in Redmond can find out just what you've got installed on your PC, all without you ever knowing about it or explicitly consenting to it.
Microsoft hasn't responded to this article yet.

Apparantly, your privacy is in danger here...