Many older PCs have been happily running the Windows 11 previews for months now despite Microsoft's stringent official system requirements, but that's about to change. ZDNet reports that some users of unsupported PCs are beginning to see a message telling them to reinstall Windows 10 when they attempt to enroll older PCs in the Insider program after performing a clean install of the Windows 11 preview.

Microsoft has made efforts to explain its reasoning for why older processors won't be officially supported by Windows 11, but it has added only a small handful of older chips to the original compatibility list it announced in June. If you've been happy with the performance of Windows 11 on your "unsupported" PC and you'd like to install Windows 11 anyway, Microsoft won't go out of its way to prevent manual upgrades on older PCs, but the company has suggested that it might withhold security updates from those PCs going forward.

Ars Technica