The first Windows 11 preview build has been released, and users are reporting being unable to install it for not meeting minimum system requirements. Microsoft announced that Windows 11 is their next version of Windows and that Windows Insiders would get their first chance of testing the preview builds this week. Microsoft also released the Windows 11 hardware requirements, which state that a TPM 2.0 security processor is required to upgrade or install Windows 11. This requirement caused quite an uproar as it would cause many computers which run Windows 10 perfectly to no longer be compatible with Windows 11.
Source: https://www.bleepingcomputer.com/news/microsoft/windows-11-preview-build-installs-failing-due-to-system-requirements/