On the 7th of December 2016, the Trichromic IT support help desk started to receive calls from numerous clients reporting they were unable to access their local area networks and the Internet.
It was immediately obvious to our support team that a bad update had been released by Microsoft. A little searching revealed the update stopped devices obtaining and IP address from the DHCPDynamic Host Control Protocol servers and that this could be resolved, for the moment, by restarting the client devices. This caused a little confusion for our clients because the default action of the Shutdown option in Windows 10 doesn't actually shut down the computer, it hibernates the computer to achieve a reduced start up time. Our clients were then informed to force a fresh boot of the computers by selecting Restart instead of Shutdown, or by holding the shift key down when clicking Shutdown which disables the hibernation feature at that moment. After a fresh boot, most devices then obtained an IP address from the DHCP servers and were able to access the local network and Internet once more. On the 13th of December 2016, Microsoft released the KB3206632 update which resolved the problem entirely, so this has subsequently been applied for our clients that have one of our Trichromic Sapphire MANAGED support agreements.