By following these steps, you can easily create a bootable Ubuntu USB from a Windows system, enabling you to test Ubuntu or use it for troubleshooting and data recovery.

Creating a bootable USB drive let's you get hands-on experience with Linux without necessarily overwriting your system.

Perhaps they referenced this guide to create a bootable Live USB on Windows, allowing them to test drive something like Ubuntu without making any changes to their PC.

Also: How to create a bootable Linux USB drive VirtualBox can be installed for free as a host on Linux, macOS, and Windows, so you shouldn't have any problems getting it up and running.

Here's how to create your own disaster-recovery boot drive with Linux, and how to force Windows to shut down installing updates.