You can upgrade from Windows 11 version 24H2 to Windows 11 version 26H2 via a small Enablement Package (KB5121794) released on September 29, 2026

Windows 11 24H2 LTSC 2024 need to be updated

2026-09 Cumulative Update Preview for Windows 11, version 24H2 for x64-based Systems (KB5124010) (26100.9550)

https://catalog.sf.dl.delivery.mp.microsoft.com/filestreamingservice/files/518df5fb-59fb-43d7-a44f-990e150b948a/public/windows11.0-kb5124010-x64_95a6272121df38221bfafc90b50baa8ec3e5294e.msu

 

and apply

small Enablement Package (KB5121794) 

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