I also have a problem with two monitors, different than yours, but maybe similar - my post here: Doesn't recognize 2nd monitor after Win Home 10 update to Vs. 1607 - Windows 10 Forums

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I'm having the issue of Windows going to black screens (two monitors) on my desktop. There is no cursor. I've had to do a hard reboot to bring it up again. All drivers are up to date, not sure what...