Recently my friend was trying to set up an environment in virtual box with the iso file for Windows Server 2012 R2. He was getting the  below error and has asked my help. I would like to share the reason for this issue in our case with you. If you come across a similar error it would be helpful and would save your time digging for more information on the web.


Error Message while mounting the iso file:

Could not get the storage format of the medium ‘C:SharedFolder_VMwindows_server_2012_r2_x64_dvd_2707946 – Copy.iso’ (VERR_NOT_SUPPORTED).

VirtualBox Error

The issue here was mainly with the ISO file (an incomplete one). ISO file size was not as mentioned in the Microsoft site and believe something went wrong while downloading the file and it got messed up.


What we did to resolve this error: Re downloaded the ISO file from Microsoft site and it worked 🙂

About the Author Dynatecon Solutions

DYNATECON is a group of dynamic professionals who are passionate about building affordable IT solutions using Dynamics 365 and Power platform. We focus on enabling digital transformation in Small scale as well as Medium scale industries. Whether you have 1 user or 100 users and planning to implement a new CRM system, please contact us at We can guide you for sure!

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