Microsoft is fighting a battle on many fronts these days:
They have been outdone by Google and Apple in the Smartphone and Tablet market - that is simply because they did not have the innovation and creativity to match them anymore.
Then they have the common problem that they cannot be trusted anymore due to the activities of the US Government.
Microsoft general counsel Brad Smith, put it like this:
What we've seen since last June is a double-digit decline in people's trust in American tech companies in key places like Brussels and Berlin and Brasilia. This has put trust at risk
And in further detail:
Last fall people in Washington, including at the White House and Congress, had a view that this was an issue that needed to be addressed but might blow over. ... it is not blowing over ... in June of 2014 it is clear it is getting worse not better
This is a problem, but not exclusive to Microsoft (Apple and Google do face the same challenge).
In this situation the product needs to be so good that it outweighs the downside, if at all possible, and that is hardly the case here....
In fact if you do not consider the risk of being spied upon when using MS products - many would consider it to be negligence these days.
The conclusions of this considerations may vary:
You may come to that you trust the US gov and that them having access to your data is OK.
This is more or less the case for English speaking countries + Scandinavia.
You may come to the conclusion that you do not want anybody else to have access to your data.
Which is mostly the case in the rest of Europe and South America and particularly true for Russia and China.
The latter markets are huge! Brasil is an emerging market with huge potential where MS is standing on the station and watching the train leaving.
Russia and China have picked up on their traditional skepticism towards the US and the rest of Europe are simply shocked by the scale of the secret US activities.
In any case there is no way anybody can say that MS software or Apple Software and HW is "safe" from the NSA - that is the main problem.
RedHat may have been put under some pressure too and have requested UEFI boot things that the Chief Penguin has dynamically rejected
. The Linux kernel looks safe and can be controlled by anyone - so it will not be possible to keep long term secrets there. This ads to the "trustworthyness" of Linux.
In this situation you need to build all the trust that you can and you should definitely avoid blue screens.