Can I rename .mrt and .rct files?

I would like to rename the Virtual Disk file on some of our VMs … we are using Nakivo for backups, so the .rct and .mrt files are present for each .vhd(x) disk file on the VMs that we are backing up.

I know how to rename a .vhd(x) file … by shutting down the VM, physically renaming the file, reassigning the VM’s disk to the new filename, then restarting the VM.

My question is — what do I do about the .mrt and .rct file that accompany the .vhd(x) file?   Do I just manually rename those as well?  Or do I have to delete them somehow before renaming the disk file?  Or is there a utility that takes care
of all this?

I could not find documentation anywhere that talks about this. If there is doc I would appreciate a pointer to it … otherwise if there is a best practice for doing this then please explain 🙂

Thanks.  John

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What do you like most in your life?

What do you like most in your life? You will ask why this is to be a human

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Windows server 2016 standard hyper-v installation error 0x80073701

Dear Gurus,

I am getting error code 0x80073701 while installing Hyper-V in Windows Server 2016 Standard edition. Here are the major error logs generated in CBS.log during service activation.

  • Package:      Microsoft-Windows-Foundation-Package~31bf3856ad364e35~amd64~~10.0.14393.0      [HRESULT = 0x80073701 - ERROR_SXS_ASSEMBLY_MISSING]
  • Microsoft-Windows-Foundation-Package~31bf3856ad364e35~amd64~~10.0.14393.0,      status: 0x80073701, failure source: Resolve, start state: Installed,      target state: Installed, client id: DISM Package
    Manager Provider
  • Package_7939_for_KB4565511~31bf3856ad364e35~amd64~~      [HRESULT = 0x80073701 - ERROR_SXS_ASSEMBLY_MISSING]
  • Package_5940_for_KB4048953~31bf3856ad364e35~amd64~~      from file: (null) [HRESULT = 0x80073701 - ERROR_SXS_ASSEMBLY_MISSING]
  • Package_5940_for_KB4048953~31bf3856ad364e35~amd64~~’,      rah = ‘2’, manpath = (null), catpath = (null), ed = 0, disp =      0)[gle=0x80073701]

DISM Cleanup-Image StartComponentCleanup & RestoreHealth and command sfc /scannow have been executed multiple times and output is also successful for these commands, however Hyper-V
is still throwing same error code - 0x80073701.

Request help on this.

Thanks & regards,


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Hyper V, Tuya Convert

I am wanting to utilize Hyper V with Ubuntu to run the Tuya Convert terminal scripts and flash ESP8266 device with tasmota.

I have been able to install Hyper V, login to Ubuntu, complete the tuya convert install but am not able to utilize the built in WIFI or the WIFI dongle I have to make a connection with the ESP device. I used a Youtube instructional with similar features
except using VMWARE workstation. Difference is when this video plugins in the wifi dongle it asks what it wants to do with it. In hyper v I am unable to get any WIFI device to be seen by the virtual machine.

Can anyone help Please. 


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Restrictions running Hyper-V under W10 Professional x64?

Please help me understand the restrictions applicable to running under W10 Professional x64.  Some users are trying to run Hyper-V under W10 and it does not seem to support either more than one socket or more than 64 logical processors.

Please notice that this SS from the VM running  W10 Professional x64 as the host and guest.  Cinebench on a 64/128 core/thread AMD 3990X.  The VM recognizes all 128 threads (logical processors) but only runs half.  Can this be changed
with a setting or will it work in W10 Professional x64 for Workstation or Windows Server?  Thanks and enjoy, John.

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Cannot enable the Promiscuous mode at Virtual switch for spanning port


How to enable Promiscuous mode at Virtual machines (Hyper-V) windows 2019 server

What the power shell command and version to run this command please?



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Windows Admin Center cannot connect to hyper v core 2019

I need help connecting to Windows server core 2019, I currently have Hyper-v core 2019 installed on a dell server, then install the windows admin center tool on another computer, using Windows 10 , when running the windows admin center application to connect
to hyper-v core, the following error message

"WinRM cannot complete the operation. Verify that the specified computer name is valid, that the computer is accessible over the network, and that a firewall exception for the WinRM service is enabled and allows access from this computer. By default,
the WinRM firewall exception for public profiles limits access to remote computers within the same local subnet.

Thanks for your support

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Windows 2012r2 Hyper-V Generation 2 firmware boot order No boot entries are configure

I have 2 host HyperV which configure in cluster. Inside the host there are multiple virtual machine. When I try to create new virtual machine usung Generation 2, its firmware boot order shows " No boot entries are configure". How to solve this
issues without break the failover cluster configuration? For your information, all virtual machine inside the host are production.


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Windows 2019 Hyper-V Host Static or Dynamic ram allocation

We are setting up a Windows 2019 Hyper-V VM running on a Physical Windows 2019 Server with 64GB of Ram. The Physical server will be running a few lightweight apps and also the Hyper V roles. I have been reading up on Dynamic V’s Static memory allocation
for the Hyper-V server and cannot decide which option is better. As I see it I have 2 ways I could go -

1. Allot 32GB of static ram to the Windows 2019 Hyper-V VM

2. Enable Dymanic Ram Set 8GB of Ram as a minimum Value, Set the Max Ram to 32GB with a 20% Memory buffer

We are planning to use the Hyper V for lightweight Remote desktop use.

What I am wondering is, does having Dynamic Memory instead of static cause speed issues for the VM when the amount of RAM required has to be increased or is this so fast that it is not noticeable.

Any thoughts would be appreciated 

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When converted vhd is attached, hyper-v vm does not boot. Even not from ISO

I have been rolling out Hyper-V hosts and creating Hyper-V VM’s for quite a while now. Everything fine, until this case. I need some greater minds to shed some light on this. 

I need to convert a running Windows 2008 R2 server with 8 GB RAM into a Hyper-V VM. We need this machine so we can run a specific old software (from time to time), and the physical machine is acting up. My Hyper-V host runs Windows 2019 Hyper-V host, has
enough physical RAM (16 GB). It has been used to create and run all kinds of VM’s (Windows 2008 server -> Windows 2019 server), Windows 10 etc.. Never failed. RAID 10 on harddisks and enough room.

I have tried a few ways to create the VHD file for this running server. Straight from the server with disk2vhd, and from system recovery backups created by Veritas Back-up Exec System Recovery (tried a few versions of the software). My VHD’s contain all
the files I see on the real server, and the real server has only one partition. No hidden partitions (checked with diskpart). 

The VM I create has the same amount of RAM as the real one, Generation 1. When I attach an iso to it, with the Windows 2008 R2 boot disk, it boots just as expected. Once I attach the VHD to it, it never boots. Black screen, blinking cursor (if the VHD is
the first boot drive), sentence showing I need to push any key to start booting from DVD if the DVD is the first boot device. But the VM does not boot. Once I disconnect the VHD, the same VM boots fine. 

Tried creating a blank VHD for the same VM: VM boots fine. 

I have never has this experience with Hyper-V and none of my Google searches bring this scenario up. Any ideas? 

Next up I will try a competitive system to boot the VHD.

Kind regards,

Wouter Pinkhof


Wouter Pinkhof PINKH bvba,

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