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Where I used to work ALL updates were first test on freestanding units, either a desktop or a server. After that testing, which could take a couple weeks, the update was pushed out. Far too many times the users got messages from our IT dept. that basically said if you install this or that update you're dead meat. With all the problems I'm reading that W10 has, I doubt seriously any IT dept. that knows its arse from a hole in the ground is going to trust Redmond. We didn't even the microsoft time server but rather the national clock to sync our machines.