Microsoft began rolling out the latest Windows 10 feature upgrade this week.

Although this was the fourth upgrade since the mid-2015 debut of the operating system, and the process has much more structure around it than it did in November 2015 when the first update was released, it's still not treated with the metronome certainty of, say, death and taxes. Customers - particularly corporate customers - are still feeling their way.

For one thing, they face a jumble of option-rich upgrade methods, like so much else associated with Microsoft's OS for decades.

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