Windows 10: Hyper-V guest VM blocks host's network connection

Hi,
I have a weird issue on my Windows 10 Enterprise and I've spent hours to solve it in vain. I have HyperV enabled with several VMs created. I have an external virtual switch created for my Wifi connection that is used by the VMs. Everything was running just fine for a couple of months until recently. I did not do any changes to my network interfaces.
Right now every time I log into any of my VMs, my Wifi connection on the host is lost. I can still connect to the internet from the guest VM, but I cannot do anything from the host. Wifi just gets disconnected and I am not able to reconnect. When I shutdown the guest VM I can reconnect the host to my Wifi just fine.
I suspected Windows Update kb4532693 as the culprit, but uninstallation did not help for this. I have tried to delete the virtual switch and create it again, but that did not help. I tried to attach an internal virtual switch to my VM and then share Wifi connection on my host to this interface, but that did not work either. I tried changing various settings on my eternal virtual switch with no result.
This is really annoying problem as all was working properly until recently and it's driving me nuts.

Does anyone have any idea what could be wrong?

:)

 

Account failed logon 4625 on VM guest when clicking the entry of VM guest on failover cluster Manager on VM Host

Issue:

We found a multiple failed logon events on VM guest (evert ID 4625) with account (the account you logon on VM host) when we clicking the entry of VM guest on failover cluster manager console on VM host with Integration servers (Data Exchange) is enabled.



How to reproduce:

1. Check the “Data Exchange” is enabled on a VM guest (Enabled by default, right?)
2. Open Failover Cluster Manager Console on VM host.
3. Click the VM guest entry
4. Then you may found multiple failed logon events on that VM guest.

Reference:

Hyper-V Integration Services



Question:

1. Does the multiple failed logons are normal or necessary?
2. If the failed logons are normal and necessary to be happened and the “Data exchange” function is good to be enabled to gather data from VM guest, any recommendation for us to correct or avoid these failed logon?

Please advise.



Constrain:

We have no chance to use same account and password on VM hosts and VM guests (because all account are managed by password management) and the Audit Policy of Audit Credential Validation must be enabled.

 

Secure file share with between host and hyper-v guest

I have a windows 10 host running hyper-v. I want to share the files that are on the host securely with a hyper-v vm without having to copy the files, i.e. the file share is on the host not the guest.

Current method is to set up a file share on the host and disable authentication for ALL file shares, this is so that I do not need to store the host account
credential on the VM which would be a risk. I then set up a internal virtual switch in hyper-v and disable files sharing protocal on ALL other network interfaces on the host. I not sure this is secure but its defiantly not very elegant for such a seeming
simple problem.

I can see it causeing problems in the future when we need another files share on the host for a differnet reason.

Is there a simpler, less invasive way to do this?

 

Windows 10 Hyper-V network connectivity lost after a while

I'm using the latest Windows 10 Pro build, installed Hyper-V, created a VM (windows 10 as well), with the default switch. Once up and running, the VM got Windows updates, and eventually lost network connectivity with the host. I re-created the VM 3 times
now and same thing, after a while the connectivity is lost. Inside the VM there are no network connections. I tried un-installing Hyper-V and re-installing it, on the host, and nothing.

Any ideas?

Thanks