Robolinux Lets You Easily Run Linux and Windows Without Dual Booting | Linux.com | The source for Linux information
https://www.linux.com/learn/intro-to-linux/2018/7/robolinux-lets-you-easily-run-linux-and-windows-without-dual-booting
The title is misleading a bit. This is a distro that comes bundled with VirtualBox and probably has some prebuilt programs to make it easy to run Windows in VB. It is not really a side by side setup, was Windows runs inside VB, which runs in the Linux environment. If you have a powerful enough machine it may indeed feel side by side, but it's more like a nesting doll.