Windows 10: No Internet Access after Windows Fall Creators Update

Background

  • I am running Windows 10 with Hyper-V enabled
  • My Hyper-V has a virtual switch: an external adapter connecting to my wireless network adapter.
  • Windows Update just installed version 1709, i.e. Fall Creators Update on 11/19/2017.

Problem

  1. My host PC’s wireless connection now has NO internet connectivity.
  2. One of my virtual machines no longer shows up in Hyper-V Manager.

Solution

To regain internet access right away, the following works for me:

  1. Launch Hyper-V Manager
  2. under Actions, select Virtual Switch Manager
  3. Verify that there is a Default Switch, installed by Windows Update – Fall Creators Update.
  4. Select the virtual switch that connects to the wireless network adapter. 
  5. Remove it.
  6. image
  7. My host PC got back Internet access.  The wireless network adapter was no longer “bridged” using the external virtual adapter.

At this point, I can use Default Switch as the virtual switch for all my guest virtual machines under NAT.

If I want to use the old setup, I just recreate a virtual switch with an external network that connects to the host PC’s wireless network adapter.

For the missing virtual machine, I had to recreate the virtual machine (i.e. configuration):

  1. Launch Hyper-V Manager
  2. Actions –> New –> Virtual Machine
  3. Connect to my existing Virtual Hard Disk

Summary

The loss of internet connectivity and a virtual machine is scary after a Windows Update.  I hope this post helps.

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