As for not being open source like Linux, Windows 7 is having a hard time in explaining why it has NSA’s adepts tuning its security mechanism. NSA is National Security Agency and is a part of United States Department of Defense. NSA is responsible for securities of involvements in various fields included technology. A better explanation of NSA can be found on Wikipedia.  The question is, why on earth Microsoft which is a commercial corporation is joining hand with NSA?  People are fearing that NSA and Microsoft are crafting a backdoor into Windows 7 to allow future tracking and interception capabilities.  Microsoft is denying this and so the NSA.  Let hope the spying part is just a rumor, and the cooperation of both parties is true, then Windows 7 is going to be a much tougher operating system for hackers to hack into.  What do you think?  Source.