https://www.bleepingcomputer.com/news/microsoft/how-to-join-the-windows-insider-program-with-a-local-account/ > The Microsoft Windows Insider program allows consumers and professionals to preview the upcoming features of Windows 10 before they are shipped to consumers. > To join the program and install the preview builds, you normally need a Microsoft account and a PC running Windows 10. Unfortunately, you must link your Microsoft account and Windows 10 device to download and install any Insider preview builds.