Randomeyes writes: "The Register reports that Windows XP has functionality built-in to the Search Companion module that allows Microsoft to log users internet searches. Information collected includes user IP address, search term and related information. A cookie is also set. 'TrustUnWorthy Computing' anyone?"
Tanveer1979 writes: though, that "the bright side is that it doesn't send anything to internet, it only downloads files, and compares the files on your computer with the files on server. And I guess a little effort is needed for the malicious to program it to send your data to web."