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ServerUser2035
Copper Contributor
Sep 11, 2026

Can't upgrade to Windows 11 Build 26340.9354

So on 8th of Sept Microsoft release the preview build on the windows insider program for the experimental channel build 26340.9354 but no matter what I can't upgrade to this build no matter what I tried to via windows update and it would download and install and ask me to reboot but when I did and the upgrade process start it would always fail and roll back so then I tried running sfc /scannow 3 times and dism to fix any corruptions but still it kept failing then I said well might try with uup dump but the download links are broken on uup dump for this build so then I did a fresh install of windows 11 joined windows insider program and tried to upgrade but it keeps failing with different error codes for example - 0x8007042b I am just now out of ideas what to do next maybe wait for a feature build or something idk I would highly appreciate if you guys leave your comments down bellow 

 

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