Microsoft has started moving Windows Insider testers from Windows 11 to Windows 10 if their PCs don’t meet Microsoft’s specified guidelines for Windows 11. Officials said in June that this would happen, but they said at that time it wouldn’t happen until Windows 11 was generally available. Windows 11 will be generally available starting October 5.

Those whose devices don’t meet the bar are seeing this message, according to BetaWiki (via MSPowerUser): “Your PC does not meet the minimum hardware requirements for Windows 11,” says Microsoft’s warning. “Your device is not eligible to join the Windows Insider Program on Windows 11. Please install Windows 10 to participate in the Windows Insider Program in the Release Preview Channel.”

Also: Windows 11 FAQ: Release date, requirements, price — plus when and how to upgrade

According to reports, Insiders in the Dev and Beta channels are receiving this message as of this week. David Nation, who has been testing Windows 11 as an Insider on an ineligible PC up until this point, told me that after he did a clean install last night and clicked on the Insider option, he saw a message that has PC didn’t qualify. He said there wasn’t a link for him to sign into the Insider program at all.

Microsoft’s minimum requirements for Windows 11 have been unclear from the start and continue to be a moving target. Officials have said they are disqualifying a number of not-very-old PCs from being eligible to get Windows 11 due to security and reliability concerns. 

Last week, Microsoft added a few processors to the “qualified” list. But they also created a loophole via which those running PCs which Microsoft deem unqualified to get the Windows 11 release and run in an “unsupported state.” Unsupported in this case means these PCs may or may not receive security and driver updates via Windows Update.

Microsoft officials have said they will continue to support Windows 10 until October 2025. Insider program officials have been warning testers who want to continue testing Windows 11 to move off the Dev Channel because the Dev Channel soon will be no longer testing Windows 11 and will instead be testing new features which may or may not ever make it into a future Windows release.