Microsoft Windows 8 operating system
With free upgrade offer set to expire in 9 days, I perform and report on an 11th hour Win8.1 upgrade to Win10. Overall the results are quite positive.
Careful use of keyboard sequences and the on-screen power button lead to a little-known Emergency Restart screen in Windows 10 (and 8 versions).
Thanks to some fine print in its Windows 8.1 support lifecycle policy, Windows 8.0 users lose maintstream support from Microsoft starting on January 12, 2016.