No internet access on Host after enabled Hyper-V (or any VM software, i.e., VirtualBox)

Recent, I installed Oracle VM VirtualBox and enabled Hyper-V feature on my Win10 Professional (1709). Since then I cannot browse any intranet or internet web pages in IE and Edge. But there is no problem at all if I disable the newly added virtual network adapter.

I tried to google and search how to fix it. But I found no clue at all.

After few days, suddenly a light bulb goes on in my head.

I think it might be the adapter priorities so all the network traffic is sending out through the virtual network adapter. I then find out the REAL solution to fix it. Now all of the newly added virtual network adapters are enabled and I have no problem at all on browsing intranet and internet web pages.

Here are the steps to fix.

1. 1. Open Windows PowerShell
   2. Run “Get-NetAdapter” to list all the adapters info
      
   3. Now you can see the IfIndex value for the virtual network adapter (it is 18 in my PC, it will be other value in your PC). Remember this value.
   4. Then we run “Get-NetIPInterface” to list all the IP interface info
      
   5. The “real” network adapter for me to go intranet and internet is IfIndex=52, and its InterfaceMetric is 35.
   6. The virtual network adapter (IfIndex=18) is having InterfaceMetric=15.
   7. In windows, the lower number means the higher priorities. So that means all the network traffic will route out from the virtual network adapter and so it seems I lost all the internet access. Now what we should do is, lower the priorities of the virtual network adapter. Because my wifi adapter is having InterfaceMetric=45. So I think putting 55 for the virtual network adapter is a good choice. Let’s try to make the change now.
   8. Let’s open “Windows Settings”
   9. Click into “Network & Internet”
      
   10. Click into “Change Adapter Options”
       
   11. Right click the virtual network adapter and select “Properties” button
       
   12. select “TCP/IPv4” and click “Properties” button
   13. Click “Advanced…” button
   14. Clear the “Automatic metric” and enter “55” to the textbox of Interface Metric (entering other proper value in your case)
   15. Click “OK” button and until all property windows are closed.
   16. Repeat the same steps from (12) to (15) for “TCP/IPv6”
   17. You may run “Get-NetIPInterface” in PowerShell Window to make sure the values are applied.

DONE!
These are all the steps to fix this issue. I hope these steps could also help you.