I am going to update windows 10 from 1809 to 21H1, but it doesn't lemme choosing what to keep

Question

please help me out because I couldn't find anything helpful on google, I really need to keep some important files

Answer 1

From the image it appears that you are using a Windows 10 iso and performing an in place upgrade repair.

See this link with text and images:
https://www.tenforums.com/tutorials/16397-repair-install-windows-10-place-upgrade.html

Personal files and applications are saved.

When properly performed these are the typical changes:

System Protection will be reset to the default of being turned off. It is recommended to turn on system protection after the repair install has finished to have restore points.
You will lose any custom fonts.
You will lose any customized system icons.
You may need to re-establish your Wi-Fi connection.
You will need to redo Windows updates subsequent to the build you have used for the repair install.
Windows.old will be created.
You will need to redo any language downloads including the display language if you changed that.

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Answer 2

Hi @Nghia Nguyen

Your Files, Apps, And Settings Can’t Be Kept Because Your Current Version Of Windows Might Be Installed In An Unsupported Directory Or You’re Trying To Install An Older Version Of Windows.

https://answers.microsoft.com/en-us/windows/forum/all/the-keep-personal-files-and-apps-option-is-greyed/6f918306-d8c4-4890-8671-ade4780d6bb8

The general solution would be to remove antivirus and unwanted apps and then run the SFC & DISM scan. Update the BIOS and the drivers of the PC

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