Listen: We are here on Earth to fart around. Don't let anybody tell you any
A number of years ago, I attempted to run Windows on a VM within Linux. It didn't go well. I tried again with the Windows 10 Technical Preview and it works fine in VirtualBox on Arch Linux. It seems to run better than booting directly into the operating system.
Sorry for the brief/uninformative post. Just impressed at how much progress virtualization has made over the years.