According to a Washington Post report, Microsoft is now admitting their co-operation with the NSA.

Cherry says the NSA’s involvement can help counter the perception that Windows is not entirely secure and help create a perception that Microsoft has solved the security problems that have plagued it in the past. “Microsoft also wants to make the case that [the new Windows] more secure than its earlier versions,” he said.

Or it could lead to increased distrust around the world about the security of Microsoft products.  After all, from the perspective of foreigners the job of the NSA is to spy on them — NSA collaboration in Microsoft closed-source software means potential for being tracked.