Windows 8: PRISM Edition
Edward Snowden's latest leak reveals that Microsoft has been helping the NSA circumvent encryption for online services like SkyDrive, Outlook.com, and Hotmail.
Microsoft has been promoting its online services heavily, especially since the launch of Windows 8, which integrate web-based file storage and email into the operating system. Microsoft has touted the convenience of storing all of your data on their servers, all while criticizing competitors like Google for violating users' privacy by indexing your searches and emails to target advertising. Meanwhile, Microsoft is encouraging users to switch to hosted services and then handing the contents of your emails and documents over the the NSA (which is in turn handing it over to the FBI and the CIA). Those who are worried about getting 'Scroogled' should know that getting 'Microshafted' is no better.
When you use a proprietary operating system like Windows, you are being funneled into a work flow that makes it easy for the NSA to intercept your communications and access your stored files.