Never enough is for Microsoft, to leverage their dominance , Microsoft has filed patents of the mother of all adware systems, an adverstising framework that uses "context data" from your hard drive. Yes, it dig more deeper than the Google Adware does, it dig all the way inside the hardrive.
"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 adware framework would leave almost no data untouched in its quest to sell you stuff. It would inspect “user document files, user e-mail files, user music files, downloaded podcasts, computer settings, computer status messages (e.g., a low memory status or low printer ink),”
How could we know that it will not touch any discreet data we stored ?. The patent makes no mention of any method by which an actual user might exert control, nor does it mention very real privacy or security concerns.
Speaking of contextual advertising, it's just too contextual.