It’s Reboot Wednesday (the day following Microsoft's Patch Tuesday) and, like roses unto spring, bugs are starting to crawl out of the woodwork. This time, if you have a network that uses SMBv2, this month’s Win7 patches may knock your network upside the head.

I first read about it on Günter Born’s site:

The KB4480970 (Monthly Rollup) and KB4480960 (Security only) updates were released by Microsoft on January 8, 2018 for Windows 7 SP1 and Windows Server 2008 R2 SP1. The updates seem to cause serious network issues for some people. Network shares can no longer be achieved via SMBv2 in certain environments.

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