Authentication Errors with Hyper-V Virtual Machine Connection

If you are getting an "Authentication Error" when trying to connect to a virtual machine under Hyper-V,  you can open the Hyper-V Settings (from the main MMC page) and disable the use of default credentials under the User Credentials section.  Once you have made this change the Virtual Machine Connection will start to prompt you for credentials when you try to connect to a virtual machine.

Three things to note:

1. If you are using a smart card to log in to your physical computer (not your virtual machine) you have to disable the use of default credentials.
2. By disabling the use of default credentials you can enter in the credentials of a different user (if you need to).
3. You can select to "remember" your credentials, which means that you will not need to type them in each time.

Cheers,
Ben