The File Extensions Database

.AVHDX File Extension

  • Developer by: Microsoft
  • Category: Data Files

What is an .AVHDX file?

.AVHDX is Automatic Virtual Hard Drive File

An AVHDX file is a disk image checkpoint used by Windows Server and its Microsoft Hyper-V technology, which bootstraps virtual machines (VM) using disk images. It contains the state, data, and hardware configuration of a VM at the time of the file creation. AVHDX files are created to save a specific state of a .VHDX virtual hard drive.

AVHDX files are known as referencing disks because they use other disks to create a differencing disk chain. Each AVHDX file contains a point in time, which is used to make up a timeline with the other AVHDX files in the chain. These files enable a virtual machine to revert to a previous state, which allows you to create a specific condition for troubleshooting a problem.

You may run into an issue where a checkpoint cannot be applied in Windows Server to revert to a save state. This may be due to a broken checkpoint chain or corrupt file. You may manually merge the AVHDX files to fix this issue, although, this should be your last option. One option is to to merge checkpoints by creating a new checkpoint and then delting it, which forces Hyper-V to automatically sort your checkpoints. You may also export your VM and import it back into Hyper-V Manager. Before you attempt to merge your files you should create a backup.

Microsoft Hyper-V allows you to create and manage a virtualized computing environment using virtualization technology built into Windows Server. Hyper-V comes with management tools and any required components.

Common AVHDX Filenames

[name of VHDX file]_(series of letters and numbers separated by dashes].avhdx - This is the naming convention of AVHDX files. They begin with the name of the VHDX file they are created from and which they contain the checkpoint. AVHDX files are located in the same folder as the VHDX file which is the "Virtual Machines" folder.

Programs that open Automatic Virtual Hard Drive File
Microsoft Windows Server 2016

How to solve problems with AVHDX files

  • Associate the AVHDX file extension with the correct application. On :
    Windows: Right click on any AVHDX file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.AVHDX files". Mac: Right click (or Ctrl-click) the AVHDX file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .AVHDX is Automatic Virtual Hard Drive File. Because only the current version supports the latest AVHDX file format. Search, therefore, e.g. on the Microsoft manufacturer website after an available .AVHDX is Automatic Virtual Hard Drive File update.
  • To make sure that your AVHDX file is not corrupted or virus-infected, get the file again and scan it with antivirus software.