Sorry if this has been mentioned here already, but I've just noticed this. IIRC MS mentioned that Windows 10 could remove "unauthorised" software before, and it looks like it's now happening. I've just confirmed on two systems (both x86, one home, one pro) that the build 10586 update will delete the MS Windows 7 games (Solitaire, Minesweeper, etc.) if you've previously added them. On one system the executables were replaced with 0 byte files, on the other they were deleted outright. This is crossing a line as far as I'm concerned, and very troubling behaviour from MS.