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Upgrade Windows 10 to 11 Manually
One of my PCs wasn't prompted for Windows 11 upgrade, but upgrade check passed.
Windows 11 Installation Assistant can be downloaded from https://www.microsoft.com/en-au/software-download/windows11.
To trigger manual upgrade, need to download Installation Assistant.
Got error when first time ran Installation Assistant. Error code #800070079. Then reboot to fix the issue.