Hello! Thanks for the question! Unfortunately, this means there is a problem with your "host" operating system (your desktop).
We mention this problem briefly at the bottom of this page:
We also refer to this Stack Overflow post:
Specifically, you need to "enable virtualization" in your operating system BIOS. I haven't found a guide I am super happy with that explains how to do this, but it is a fairly widely discussed problem if you search the internet for BIOS guides for enabling virtualization. If you find one (or take some screen shots and write one), please do share so others can learn how you solved the problem!
Also, if you have any problems trying to enable virtualization, please post here so we can help!