Synergy HyperV Backup


Segment/Isolate your backups media from Malware 
Force disks to offline after backups.
Become invisible from Ransomware/Viruses/Malware or Malicious Acts.

The problem

Trying to create backup procedures for Hyper-V that are invisible to malware.

We came across clients’ incidents where a server was infected and all existing backups were deleted on purpose.

Ransomware attacks are now so common that businesses of all sizes need to take precautions in advance in order to minimise effects  and avoid paying ransom to get their data back.


A backup software is not an antivirus and cannot protect directly from these attacks.

However it can provide a quick and reliable way to recover from an attack and get your files to a state they were before they were encrypted.

Latest ransomware are smart enough to attack a backup software itself, deleting backups already taken and stop you from recovering.

We need to create a strategy where our backups are isolated from malware.

The solution

Synergy HyperV Backup is a backup application with some unique features:

  • It runs on the HyperV itself. We do not use an agent to connect to your server. We built the software to run on HyperV. Your backups are 100% segmented/separated/isolated from your VM Servers. Malware cannot infect those backups as there are not accessible
  • Offline disks: You can backup to a disk and then set the disk as offline. Malware cannot even access this disk to infect it
  • You can have a GUI inside HyperV
  • All tasks are performed from within HyperV
  • You can have multiple profiles for your VM backups all from a single form
  • Easily create your schedules from within the application, no need for a command line
  • Compatible with 2012, 2012R2, 2016, 2019 and 2022 versions
  • Backups are taken online without stopping/pausing your VMs
  • Have up to 9 retention versions of each backup
  • Automatic offline backup after the completion of your first backup
  • Upload your backup to an Amazon S3 bucket
  • Execute script commands before and after your backup execution
  • Send an email after the execution of the backup

Features we are currently working on:
A Validation/Auditing task that will check if  backups taken are working OK
A Multi Platform App that will let you check status of your backups on: Android, iPhone, Windows , MAC
Add more information about VMs like Performance, Snapshots Status and Storage Consumption
Add more Cloud providers
A faster compression mechanism

Who needs it

IT/MSP Companies, System administrators, network administrators , security administrators or any power user who wants to create an extra layer of security from hackers.


Visual Tour

Download your free 30 days trial

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Download your Free Community Version

Version has all features for just one instance of a Virtual Machine
(No Card Needed)

Get your License for $199.00 per year

Includes updates, remote tech support and allows backups of unlimited number of VMs

FREQUENTLY Asked Questions

Hyper-V is a Microsoft hypervisor that enables native virtualization on x86-64 systems. It allows multiple operating systems to run on a single physical server, in isolation from one another, by creating virtual machines (VMs). Hyper-V provides a virtualized set of hardware to the guest operating system, which can run its own operating system. Hyper-V can be used to create and manage virtual machines and their resources, including storage, networking, and memory. It also includes a variety of management and monitoring tools for administrators to use.


For those who may not be familiar with the distinction between type 1 and type 2 hypervisors, here’s a brief explanation:


Type 1 hypervisors, such as VMware ESXi, Citrix XenServer, and Microsoft Hyper-V, function like a low-footprint operating system and run directly on the host computer’s hardware. They are often referred to as “bare metal” or “native” hypervisors, and are typically used for production-ready virtualization in data centers.


Type 2 hypervisors, like VMware Player, Oracle VirtualBox, and Parallels Desktop, run as a software layer on an operating system, similar to other computer programs. They are also known as “hosted” hypervisors and allow end users to run virtual machines on personal computers, making them ideal for training, development, and research purposes.


Many administrators are unsure if Hyper-V is a type 1 or type 2 hypervisor due to its appearance of running on top of the operating system. However, this is not the case. Hyper-V is actually a type 1 or “bare metal” hypervisor. This is because when the Hyper-V role or feature is installed or enabled on a system, the original operating system is converted into a virtual machine and a layer of Hyper-V hypervisor is added underneath it. This is the reason why the system restarts when the Hyper-V role or feature is installed. After restart, the original Windows operating system operates as a virtual machine on top of the Hyper-V hypervisor. In short, Hyper-V functions as a type 1 hypervisor under the hood.


Hyper-V is often mistaken as a type 2 hypervisor due to its appearance of running on top of the operating system. However, when the Hyper-V role or feature is installed or enabled on a system, the original operating system is transformed into a virtual machine and a layer of Hyper-V hypervisor is installed beneath it. This is why the system needs to be restarted during the installation process. Once restarted, the original operating system functions as a virtual machine on top of the Hyper-V hypervisor, making it a type 1 or bare metal hypervisor.



Up to Version 2019 yes it’s free. You can download an ISO file from Microsoft, boot with it on your physical server and then setup Hyper-V as usual.

As of Jan/2023 there is no free 2022 version.
However you can download a windows 2022 evaluation ISO, install on a physical server the Core edition and add the Hyper-V as a feature using the following powershell command:

Install-WindowsFeature -Name Hyper-V -IncludeManagementTools -Restart


Check this really interesting article:

How to Install Hyper-V on Windows Server Core


Yes we have tried the application with Server 2022 Datacenter version on AWS using the metal instance. Check our videos for examples.


After a backup is finished it can upload a copy to your AWS bucket.

It’s a full working version that allows you to backup just one instance of an application.

Updating is also disabled.

You can use the following commands from within Powershell:



Download demo:

Invoke-WebRequest -uri -outfile



How to unzip downloaded file

Expand-Archive .\



After downloading and expanding the archive, change to SynergyHyperVBackup folder and run the Setup.exe.

How to setup Synergy Hyper-V Backup from Command Line Step 2

Microsoft’s .Net Library Long Term Support Ver 6 will be installed for you automatically.

How to setup Synergy Hyper-V Backup from Command Line Step 3

We suggest to change setup location to c:\SynergyHyperVBackup , it will be  easier this way for you to run the application.

This is how you can setup the email settings on each profile:


Synergy Hyper-V Backup, sending emails using TLS 1.2

Yes, this is the company we use for our own servers and highly recommend:




Yes, end of October 2021 there a was a worldwide supply chain attack to  multiple maritime companies via Danaos Management Consultants.

The company kept a reverse SSH tunnel from clients to their office for providing remote support and updates.

The hackers breached their main server and were able to access clients’ servers via the SSH. They were able to encrypt data, which in this incident were emails. They even stopped and encrypted the main Oracle database too. 

The client’s server was a Linux VM running on a Hyper-V Server. The encryption started around Saturday midnight.

Our client’s latest backup was completed early Saturday morning.

We were informed Sunday morning and were able to bring everything back online by the same Sunday evening.

Due to the Hyper-V isolation (as designed in advance) no backups were harmed. 

Monday morning was business as usual for the client and no one even knew what had happened during the weekend.

After the incident we added more backups jobs and especially an Offline one with retention enabled.

Email credentials are saved as encrypted in the configuration file.


Task schedule credentials are not saved in the configuration file.

Synergy Hyper-V backup can run on a Windows Server Core/Hypervisor (Strongly Suggested):



Or it can run on a Windows Server with Hyper-V as a feature:


Hyper-V How To Articles...

After a client’s power failure where the UPS failed to properly  shutdown the Hyper-V Server, VMs were not able to start. 

See below for the error we got every time we tried to start a VM:

Start-vm :
‘win-8-mngmt’ failed to restore virtual machine state. (Virtual

Machine ID B790B331-90AD-4D68-B2B4-34B604F849A2)

Virtual machine ‘win-8-mngmt’ could not be started because the hypervisor is

not running (Virtual machine ID B790B331-90AD-4D68-B2B4-34B604F849A2).

the following actions may help you resolve the problem:

(1) Verify that the processor of the physical computer has a supported version

if hardware-assisted virtualization.

(2) Verify that hardware-assisted virtualization and hardware-assisted data

execution protection are enabled in the BIOS of the physical computer.  (If

you edit the BIOS to enable either setting, you must turn off the power to the

physical computer and then turn it back on.  Resetting the physical computer

is not sufficient.)

(3) If you have made changes to the Boot Configuration Data store, review these

hanges to ensure that the hypervisor is configured to launch automatically.

All VMs were on a saved status and were not able to start.
The Hyper-V’s version was 2012R2.

For our case it seemed that updates that were already installed and run after the reboot of the server created the problem:
The following updates caused the issue: KB5009624 and KB5009624.
So here it is how to uninstall them from command line:

wusa /uninstall /kb:5009624

wusa /uninstall /kb:5009595

Just to be on the safe side, download and install hotfix KB5010794 which fixes this bug.

You must download it manually from the Microsoft Update Catalog.

Download and install from within Hyper-V from this link:

In case you want to remove and re install the hyper-V feature use the following Power Shell commands:

Remove-WindowsFeature -Name Hyper-V

Install-WindowsFeature -Name Hyper-V

Start your Hyper-V Manager , right click over your server and select “Import Virtual Machine”:



Browse to the location of the backup folder:




Select the Virtual Machine to Restore:



Select “Register…” when you restoring to a new server or “Restore…” for restoring to the same server:



This is a bit tricky, first locate where your Virtual Disks are located:



Then select the same folder:



If you get a similar error just select the “Default Switch”:



Click “Finish” to start the restore:

Your VM is now restored/registered to your Hyper-V:



And it’s also visible from Synergy HyperV Backup:


Run the following command from PowerShell:

Get-WinEvent -FilterHashtable @{ LogName = ‘System’; Id = 41, 1074, 6006, 6605, 6008; } | Format-List Id, LevelDisplayName, TimeCreated, Message


A proper restart or  shutdown looks like the following:


Id : 1074
LevelDisplayName : Information
TimeCreated : 1/28/2023 3:51:44 PM
Message : The process C:\Windows\System32\shutdown.exe (YourServer) has
initiated the restart of computer YourServer on behalf of
user YourServer\Administrator for the following reason: No
title for this reason could be found
Reason Code: 0x800000ff
Shutdown Type: restart


Where a power failure will look like:


Id : 41
LevelDisplayName : Critical
TimeCreated : 1/28/2023 1:02:31 PM
Message : The system has rebooted without cleanly shutting down
first. This error could be caused if the system stopped
responding, crashed, or lost power unexpectedly.

Id : 6008
LevelDisplayName : Error
TimeCreated : 1/28/2023 1:05:14 PM
Message : The previous system shutdown at 9:58:04 AM on ?1/?28/?2023
was unexpected.