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apparently old curmudgeons who're being stubborn are finding windows 7
machines randomly 'upgrading' to win 10
http://www.pcworld.com/article/3043464/windows/windows-7-users-complain-of-unprovoked-windows-10-auto-upgrades.html
a bit more nuts and bolts - lockouts, password lockouts and hardware
failures:
https://www.reddit.com/r/technology/comments/4a0asv/warning_windows_7_computers_are_being_reported_as/