KB3201845 changes Windows 10 V 1607 to Build 14393.479–trouble with internet connection?

Microsoft has released cumulative Update KB3201845 for Windows 10 Version 1607 and Windows Server 2016. Here are a few information about that non security-related update. Addendum: The broken internet connection reported at several internet sites and discussed within my blog post isn’t related to Update KB3201845.


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Update KB3201845 has been released end of November 2016 in Release Preview Ring for Windows 10 Version 1607 (see my German blog post Windows 10 Build 14393.479 im Release Preview Ring). Now Microsoft has released update KB3201845 (Cumulative Update for Windows 10 1607 and Windows Server 2016: December 9, 2016) for alle users. This update contains quality improvements and fixes for Windows 10 Version 1607 and Windows Server 2016. But there are no new features included. Here is a list of changes:

  • Improved the reliability of mobile device management (MDM) disenrollment, Distributed Component Object Model (DCOM), Peripheral Component Interface and PowerShell.
  • Addressed issue that causes excessive battery drain if you have a Chinese Input Method Editor installed and use Windows Hello to log in.
  • Addressed issue with OLE drag and drop that prevents users from downloading a SharePoint document library as a file.
  • Addressed issue with Super Floppy-formatted fixed media devices that are not recognized by Windows 10 Anniversary Update or accessible in Windows Explorer.
  • Addressed issue that causes the System Center Configuration Manager (SCCM) client to fail installation when a device is re-imaged using the SCCM task sequence.
  • Addressed issue that causes the loss of optional component (OC) state information, including all Hyper-V virtual machines, after upgrade.
  • Addressed issue that causes Windows Explorer to display information that’s inconsistent with what’s stored on the Floppy disk.
  • Addressed issue that, after connecting a shared CD/DVD-hosted drive with no media inserted, causes some of the commands, like DIR and NET USE, to hang.
  • Addressed issue where customers cannot use directory cache sizes greater than 64 KB.
  • Addressed issue where Windows Explorer sometimes does not prompt for credentials when a user logs on using a Microsoft account.
  • Addressed additional issues with application compatibility and Internet Explorer

This update is distributes via Windows Update and requires a restart after installation.

Internet issues after installation – DHCP-Client fails

It seems that Windows 10 this update is causing worldwide trouble with internet connections. Users are reporting, that the internet connection is lost after the update has been installed. It seems that the network card (LAN, Wi-Fi) isn’t able to receive an IP address from DHCP server. Microsoft has released a Microsoft Answers post, linking to this Microsoft support article, giving step-by-step trouble shooting.

Note: It seems that the failing internet connection has nothing to do with this update. Machines with Windows 10 failed before KB3201845 has been installed. Addendum: I’ve had the error on a machine and I documented many details here (but only in German).

Beside the Microsoft support arcticle linked above, there are several workaround. One is a complete restart (press Shift key and select Restart Windows in On/Off menu). Also it’s possible to open an administrative command prompt window (press Windows+X and select the command prompt (Administrator) menu entry). Then enter the following commands:

netsh Winsock reset
netsh int ip reset
ipconfig /release
ipconfig /renew
ipconfig /flushdns


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Resetting the Winsock and IP should be sufficient. Some people also reported, that disabling fast start in Windows 10 will cure the problem.

Similar articles:
Windows 10 Insider Preview Build 14986 released in fast ring
Office patch day (12/05/2016)


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