https://www.techradar.com/news/google-kills-windows-10-on-chromebooks

It appears that Google has dropped its plans to allow Windows 10 to be installed alongside Chrome OS on Chromebooks.

The plans – known internally as Project Campfire – would let Chromebook owners install Windows 10 so that they could switch between Microsoft’s operating system and Chrome OS – the default operating system made by Google that ships with Chromebooks. The feature was often referred to as Alt OS – in reference to the ability to install an alternative operating system.