HyperV Error: 'Computed Authentication Tag Not Match Input Authentication Tag' in Windows 10

Hyper-V Error: Computed Authentication Tag Does Not Match Input Authentication Tag in Windows 10

Hyper-V is a popular virtualization technology that allows users to create and run virtual machines on Windows 10. However, some users may encounter the error "Computed Authentication Tag Does Not Match Input Authentication Tag" when trying to start a virtual machine. This article will provide a detailed explanation of the issue and offer potential solutions.

Understanding the Error

The error "Computed Authentication Tag Does Not Match Input Authentication Tag" typically occurs when there is a problem with the virtual machine's configuration file or the virtual hard disk. This error can be caused by several factors, including moving the location of the ISO assigned to the virtual DVD drive, power outages, or unexpected shutdowns.

Potential Solutions

There are several potential solutions to this issue. Here are some steps you can try:

1. Check the virtual machine's configuration file and ensure that it is not corrupted. You can do this by opening the virtual machine's settings and checking for any errors or inconsistencies.

2. Check the virtual hard disk for any errors or inconsistencies. You can do this by opening Disk Management and checking the status of the virtual hard disk.

3. Try creating a new virtual machine and see if the issue persists. If the new virtual machine starts without any issues, then the problem may be with the original virtual machine's configuration file or virtual hard disk.

4. Try assigning a different ISO to the virtual DVD drive and see if the issue persists. If the virtual machine starts without any issues, then the problem may be with the original ISO.

5. Try repairing the virtual machine's configuration file or virtual hard disk using the Hyper-V Manager. To do this, right-click on the virtual machine and select "Repair" from the context menu.

Preventing the Error

To prevent this error from occurring in the future, it is recommended to regularly back up the virtual machine's configuration file and virtual hard disk. Additionally, it is recommended to avoid moving the location of the ISO assigned to the virtual DVD drive and to ensure that the virtual machine is properly shut down before powering off the host computer.

References

• Type: Article
  Title: Hyper-V Error: Computed Authentication Tag Does Not Match Input Authentication Tag
  Author: Microsoft Corporation

• Type: Article
  Title: How to Fix Hyper-V Virtual Machine Error: Computed Authentication Tag Does Not Match Input Authentication Tag
  Author: Sysprobs

• Type: Book
  Title: Windows Server 2016 Hyper-V Cookbook
  Author: Sander Berkouwer

By following the steps outlined in this article, you should be able to resolve the error "Computed Authentication Tag Does Not Match Input Authentication Tag" and get your virtual machine up and running again.