Heads-up: Microsoft no longer documents a registry key for unsupported PCs — via Microsoft Support
MythNeeds adminWindows 11
Guides still pass around the MoSetup 'AllowUpgradesWithUnsupportedTPMOrCPU' registry value. Microsoft's current page about devices that don't meet the requirements has no registry method at all. It advises against installing Windows 11 on such PCs and warns they aren't guaranteed updates, including security updates.
What to do instead
- Read Microsoft's page (source below) before you decide. If a PC doesn't meet the requirements, the supported path is new hardware.
Microsoft says unsupported installs get a desktop watermark, aren't entitled to support and aren't guaranteed updates. Users on Microsoft Q&A have also reported that the old MoSetup value no longer had any effect with 24H2 media.
Sources
- Windows 11 on devices that don't meet minimum system requirements — by Microsoft Support
- Source reviewed
- 2026-11-02
- Link checked
- Not yet
- Tested hands-on
- Not by Oddbyte.Me
Oddbyte.Me hasn't tried this on every Windows build, so keep the undo handy.