Die Zeit this morning published an article (Bundesregierung warnt vor Windows 8) in which it says, that die German government thinks Windows 8 is dangerous ("Aus Dokumenten, die ZEIT ONLINE vorliegen, geht aber hervor, dass die IT-Experten des Bundes Windows 8 für geradezu gefährlich halten.") because Microsoft can control every computer and thus so can the NSA. This stems from the way the chip interacts with "Trusted Computing", which is part of Windows via TPM. The specifications are standardized by TCG whose members are all American companies Die Zeit goes on to point out. The government agency warns against the use of Trusted Computing. The article concludes that the German government may be forced to switch to Linux.
Trusted Computing: Bundesregierung warnt vor Windows 8 | ZEIT ONLINE