Let Microsoft push Windows 10 at its leisure, and it will end up in your hands eventually. But there’s a second option, one that’s a bit more fun. And that’s to download Windows 10 right now.

Learn how to turn on or off Developer Mode in Windows 11/10 using Settings, GPEDIT & REGEDIT. You don't require a Developer License to develop!

Give your operating system a name (like "Windows 10 Technical Preview") and choose Windows 8.1 from the list (since VirtualBox doesn't have a Windows 10 option yet).