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VM won't start due to authentication tag error (vTPM using untrusted guardian)

December 11, 2019, 2:41 am
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I've got a VM with vTPM and BitLocker enabled using an untrusted guardian.

This VM now won't start, the event log is showing the event:

The computed authentication tag did not match the input authentication tag

I've checked that the VM has a key protector, and that the signed and encrypted certificates match the installed certificates for the untrusted guardian.

If I disable the vTPM I can start the VM and it boots after asking for the bitlocker recovery key.

There are no errors in the HGS Client event log, so I'm not sure what is wrong with this VM.

Any suggestions as to where to start looking?

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Isolate local test lab traffic from office network

December 6, 2019, 12:27 pm
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I have just set up a Hyper-V test lab on my office workstation for the purpose of testing network changes prior to implementation. The lab has a host server running Windows Server 2016 with DHCP, DNS, Windows Deployment Service and Active Directory. There are also 2 clients running Windows 10. Currently the lab is on a Private switch, so there is no risk of its traffic bleeding into my office network. I'm at the point where I need to connect this test lab to the internet, but in a way that there is no risk of introducing its traffic, rogue DHCP servers, DNS explosions or any other assorted goodies onto my office's production network. My workstation hosting this test network is a client on my office network which has a Windows 2012 R2 server also running DHCP, DNS and AD, so there's plenty to go wrong if don't do this properly. I've set my lab on a different subnet, 192.168.10.# vs the office's 192.168.20.#. I'm not sure if this is sufficient, or if there's more that I'm missing. 

I know I'm not the first person to do this, but despite all my searching, I can't seem to find anything that addresses my particular configuration. I'm still new to this, though, so maybe I'm not searching the right terms. Also, if someone knows a good tutorial to point me toward, that would be great too.

Thanks.


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Hyper V 2019 Core Remote Management in a NON domain environment.

December 13, 2019, 2:56 am
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I am setting up a new Domain environment. I have installed Hyper V 2019 on a server. I can not remote manage the server with Hyper V management tools, and it looks like it is because I am not in a domain environment. I can RDP to the server with no issues. But when I try to use the Hyper V management utility I get an error. Like i said currently I am in a workgroup environment.

"An error occurred while attempting to connect to a server 10.x.x.x" Check that the Virtual Manage Management service is running and that you are authorized to connect to the server"

I am not even sure how to check to see if the service is running. 

Any help is appreciated.

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Running ANdroid Emulator on Hyper-V 2016

December 13, 2019, 6:11 am
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Running ANdroid Emulator on Hyper-V 2016

I am using Windows server 2016 Datacenter with Hyper-V installed. I created windows 10 VM for purpose of providing Android app developement to Developer.

I install Android Studio successfully. But cant able to run Android Emulator. 

If any one has the solution, let me know.


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problem NIC TEAM event id 16945

December 13, 2019, 7:03 am
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This event (16945) appears on my Windows server 2016 Datacenter. I have Hyper-v on this server and it crashes when this event starts to appear. I made a Nic-Team of 4 Gigabit cards. This is the message: MAC conflict: A port on the virtual switch has the same MAC as one of the underlying team members on Team Nic Microsoft Network Adapter Multiplexor Driver.

Already changed the mac of the virtual switch in Hyper-V but nothing has changed, I still have problems.
can anybody help me? thank you

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Hyper-V 2nd Gen: Can’t install an operating system

December 15, 2019, 1:04 pm
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I am running Hyper-V Manager on a Windows 2019 Standard server.  I am trying to install a Windows 2019 Standard guest OS.  I create the machine as a 2nd Gen machine and give it appropriate settings.  I a pointing it to an iso.  On startup it failes to boot off of iso.

I have search and tried most recommendations including

Disabling secure boot

Changing keyboard setting to physical

Changing boot order

Changing Template under secure boot

None have enabled me to load the Guest os

any thoughts

 

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Hyper-V VHD Error Count

December 15, 2019, 4:54 pm
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[Cross-posted from SCOM forum as deemed a Hyper-V specific question]

I have the Hyper-V 2016 Management Pack Extensions installed into my SCOM 2016 installation.

I'm seeing a bunch of the following errors:

Hyper-V MPE 2016 VHD Error Count Monitor

Instance PATH.avhdx
Object Hyper-V Virtual Storage Device
Counter Error Count
Has a value 5
At time 2019-12-12T13:58:06.0000000+00:00

This monitor is reporting the underlying VHD Error Counter, which also has the same value.  I don't know what this counter actually means, and I can find no information on the web that explains it.  The notes on this counter say "The Error count should always be zero for the virtual storage device", which of course has me concerned that it is a real problem.

Does anyone know what this means and why it happens?
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Teaming and VLANs

December 16, 2019, 1:28 am
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Hi guys,

I have a standalone host (Windows Server 2016) with a 2 NICs Teaming in which 5 VLANs will pass. The VMs will be connected to the virtual switch linked to this Teaming and connected to a different VLAN.

To RDP to the host, I have to set the VLAN 3323 (Management).

Do I have to :
1. Set the VLAN 3323 in the Teaming parameters
2. Let the virtual switch without VLAN ids
3. Configure each VM with its dedicated VLAN

or 

1. Let the Teaming parameters without VLAN id
2. Set the VLAN 3323 in the virtual switch VLAN id
3. Configure each VM with its dedicated VLAN

Thank you for your help.

Cheers,

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Setting Hyper V 2019 Free in a new non Domain Enviroment

December 16, 2019, 6:57 am
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I am setting up a new Domain environment. I have installed Hyper V 2019 on a server. I can not remote manage the server with Hyper V management tools, and it looks like it is because I am not in a domain environment. I can RDP to the server with no issues. But when I try to use the Hyper V management utility I get an error. Like i said currently I am in a workgroup environment.

"An error occurred while attempting to connect to a server 10.x.x.x" Check that the Virtual Manage Management service is running and that you are authorized to connect to the server"

I am not even sure how to check to see if the service is running. 

Any help is appreciated.

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Host Windows Server 2019 Std + VM Licensing

December 16, 2019, 1:23 pm
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Hi All,

I had installed and activated a host Windows Server 2019 Standard w/ 16-cores and normally with an OEM key.

After two weeks, we had to spin up a Hyper-V VM running the same Windows Server 2019 Standard, so I did so.

Tried to activate the VM using the same product key, however, it did not activate and in addition, deactivated my Host.

I have tried to re-activate the host via GUI and command-line (slmgr.vbs /ipk + slmgr.vbs /ato), but again, not activating and receiving the following error "Error 0xC004C003 The activation server determined the specific product key is blocked".

How should I proceed?

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hyper-v video remoting was disconnected unexpectedly

December 17, 2019, 3:30 am
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i am using Windows 10 pro x64(host and vm itself). Have just installed the Hyper-V features and created a new VM.

When i tried to start it, i got the "Video remoting was disconnected unexpectedly" message. it is showing underneath on the left side, that the vm is actually running but i could not connect with it. 

i can't even connect using remote desktop, because windwos is still not installed on it.

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Need help fixing broken Hyper-V disk chains, and identifying root cause

December 18, 2019, 5:59 am
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Hi, I'm running Hyper-V on Windows 10 Pro 1903. In the past week, I've had two virtual machines which have developed issues with their hard disks. The machines both have checkpoints, and are saved. When I go to resume the machines, I get a "failed to change state" error, and when I check in event viewer, I have

"'Linux-Castle-dev': Failed to open attachment 'D:\VMs\Disks\Linux-Castle_625E353F-F903-42CF-A536-1FDE83E55F0B.avhdx'. Error: 'The chain of virtual hard disks is inaccessible. There was an error opening a virtual hard disk further up the chain.' (7864368). (Virtual machine ID D8683EA0-3317-48BF-B2FB-DDFBC3BEC4D5)"

Based on what I've found online, I go into the machine's settings, inspect the hard disk and start working my way back up the chain, but the chain seems to be intact, all the way back to the root VHD. I haven't found any other suggestions for how to fix this.

Does anyone have recommendations for what I could try to do to fix these errors, and what might be causing them? Any help would be appreciated.

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Hyper-V lists non-existent VM named "Th-VM" to DPM

December 18, 2019, 9:00 am
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Hello everybody,

after diagnosing why every DPM 2019 I know of offers a bogus "Th-VM" VM when we configure Hyper-V RCT backups, Mike Jacquet asked me from this thead https://social.technet.microsoft.com/Forums/en-US/83718d47-9d4b-4579-a479-c1d96298b084/dpm-2019-insists-offering-nonexisting-vm-a-for-hyperv-host?forum=dpmhypervbackup in the DPM forum to post here. Mike found that it is Hyper-V which enlists a VM named "Th-VM". For details, please see the linked thread.

What can we do about this?

Best Regards, Stefan Falk

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NIC Assignment for Management and Guest OS

December 18, 2019, 9:48 am
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I need to setup Hyper-V, the server has 2 NIC cards, so I would like to use 1 card for physical management and 1 NIC for guest OS. How do I define the virtual switch?
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Hyper-V 2019 default disable Virtualization Based Security for newly created VMs

December 18, 2019, 12:42 pm
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Hi Guys,

Basically every VM I create comes with VBS enabled and this gives me an error whenever I try to add virtual HBAs. I know I can powershell command to enable VirtualizationBasedSecurityOptOut and work around this problem. The questions is: is there any way of disabling VBS for every new machine? Like setting it default.

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Unable to move Hyper-Vm VM: You do not have the required permissions.

December 18, 2019, 3:13 pm
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Hi,

I currently have 2 Hyper-V stacks, on 2 separate domains. Out goal is to migrate all VM's current on Domain1 to Domain2.


I created a cross-forest trust between the 2 domains, but I continue to get this error:


An error occurred while attempting to contact the Virtual Machine Management service on the destination computer. Verify that the service is running and you are authorized to connect to the destination computer.

You do not have the required permissions to complete the task.

I have ensured that accounts from both domains have are members of the Administration group on the other domain, and should have the ability to remote access. I have also ensured the Virtual Machine Management service is running. DNS is working properly.


I cannot logon to the host Domain2 machine that I am attempting to move them to with my Domain1 Account, although there is a VM on Domain1 that is joined to Domain2 and I can logon to that one with Domain1 accounts.


I'm sure i'm missing something very obvious but I would greatly appreciate assistance!


Regards,

Sam


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Hyper-V VM cursor disappears

December 18, 2019, 8:01 pm
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Hi,

I have a virtual machine that it's cursor keeps disappearing when working in word (when going through the document pages), the hide pointer while typing is unchecked and the latest updates are installed. Any suggestions to try?

Thanks!

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Unable to edit devices names in a VM

December 19, 2019, 9:24 pm
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Hi

I have been trying to edit the names of the remote audit devices in a VM client. In Control panel > Sound > Remote Audio it allows me to change the name of the device but it dose not save the changes. I have tried changing the security settings for the VM but still unable to make changes?

My reason for making the changes are because I am trying to run Rosetta Stone version 3 within the VM. The software runs ok but does not pick up the microphone, my research into why this is has turned up that the Rosetta Stone software is looking for a device named microphone so I have try tried to change the device to that. All I seen to be getting is more cookie crumb trail.

Is there anyway that these settings can be change?

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VM's CPU is pegging out but host machine is at low cpu, what am I doing wrong?

December 20, 2019, 11:27 am
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I am running SQL Server on my 'SQLVM'. I have 24 cores allotted to it. It's eating up all the cpu on the vm.

Here is the host machine's task manager with the hyper-v servers behind it:

https://i.postimg.cc/m27sKPtG/1.jpg

This is my vm settings for the cpu:

https://i.postimg.cc/3NHLGx7g/3.jpg

I was thinking I should move my sql instance to the dedicated machine to give it access to 'more' resources.

Am I reading this incorrectly or am I going at this wrong way?

Host: W2012R2 Datacenter

VM: W2012R2 Standar

Thank you in advance!

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Licensing

December 20, 2019, 8:08 pm
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We are moving some services around and looking to place a development/test environment in a new colo facility. It will be 100% Microsoft using Hyper-V. The only users that will have access to the servers have current MSDN subscriptions so I think we are okay not purchasing commercial licenses for the OS or SQL.

My question is, if I want to place a Win 10 VM on the Hyper-V host and have it used by a non-msdn licensed user would I be in compliance if I just purchase a Win 10 license for that VM? The Win 10 VM and user would not be using any of the servers other than as a hyper-visor. They would only need internet access.

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