https://www.bleepingcomputer.com/news/microsoft/windows-11-preview-build-2200051-released-heres-how-to-download/ > Microsoft has released the first preview build of Windows 11 today, build 22000.51, to Insiders in the Dev channel of the Windows Insider program. > For those unfamiliar, Windows Insider Program allows interested fans, enthusiasts, professionals, developers and even Enterprise users to test the upcoming Windows 10 and Windows 11 versions before they are released.