Well I would mention that Windows 10 is available for free and is quite easy to install and run VM as an Enterprise version is available as well, BUT, it would seem that because these are preview versions that there is an outside chance that Microsoft has a key logger included...............
Outside chance? I think it's well documented that they are recording EVERYTHING. I wouldn't use IE10 outside of a brief look in a VM.
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Well documented? Do you have a cited source for that statement. It's well documented that MS have an opt out for the customer experience on all of their products.
They are one of the safest companies to use in regards to your privacy if you are comparing them to Apple and Google.