windows 11 22h2 has been publicly available september 2022 - acx-classextension compatible with panther lake windows 11 21h2 last update has been released september 2024 - acx-classextension not compatible with panther lake (of course there will be no new updates) windows 10 21/2h2 last update has been released september 2026 - acx-classextension not compatible with panther lake