Offtopic: Speaking about Microsoft, I just noticed a "Windows 10" advertisement in my Windows 7 taskbar next to the clock. Windows update silently installs and launches new applications (two executable) and one of them comes with enabled Telemetry. 23MB big ad-program is located in C:\Windows\System32\GWX\. Check your Windows 7/8 taskbar.
Source: http://venturebeat.com/2015/05/31/microsoft-starts-prompting...
https://support.microsoft.com/de-at/kb/3035583/en-us
@downvoters: even if it's offtopic, see at least the source