writes "According to Nadim Kobeissi, Windows 8 is configured by default (using a new featured called Windows SmartScreen) to immediately tell Microsoft about every app you download and install. This is a very serious privacy problem, specifically because Microsoft is the central point of authority and data collection/retention here and therefore becomes vulnerable to being served judicial subpoenas or National Security Letters intended to monitor targeted users. This situation is exacerbated when Windows 8 is deployed in countries experiencing political turmoil or repressive political situations."
While SmartScreen is enabled by default, it's possible for users to turn it off
. Also, it's worth noting that Microsoft is hardly alone in this regard, given the rise of app stores over the past several year. (Not that it exculpates this behavior.)