In the Storage settings, mount your downloaded MS-DOS 6.22 ISO to the virtual optical drive.
The bare ISO installs a working DOS. But for it to truly "work" for games or legacy apps, you need drivers. Here's how to integrate them post-installation. ms dos 622 iso work
You cannot install MS-DOS 6.22 directly onto a modern PC hard drive. You must use virtualization software to simulate the hardware it expects. Option A: Oracle VM VirtualBox (Recommended) VirtualBox is free and allows you to create a virtual PC. Create a new Virtual Machine, setting the OS type to "DOS". Allocate a small amount of RAM ( MB is more than enough). In the Storage settings, mount your downloaded MS-DOS 6