Please uninstall any of these non-Microsoft software:
a) antivirus
b) firewall
c) drive encryption
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Download to the desktop: Windows 11 Media Creation Tool (MCT) (Windows 11 iso)
https://www.elevenforum.com/t/download-official-windows-11-iso-file-from-microsoft.1009/
https://www.microsoft.com/software-download/windows11
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Disconnect the computer from the internet (both Ethernet and Wifi) (if available mechanical off)
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Perform an in place upgrade repair while disconnected from the internet:
https://www.elevenforum.com/t/repair-install-windows-11-with-an-in-place-upgrade.418/
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