CAN'T UPGRADE FROM WINDOWS 8 TO WINDOWS 10

I have a Lenovo laptop that is currently running Windows 8, and it is not a bad laptop:

When I try to run the Windows 10 setup I get this error when it's almost done:

I am using the 21H1 update installer.

I do not wanna format the PC because I do not have my Windows activation key, so I wanna use the one that Windows is using currently.

Use the Magical Jelly Bean Keyfinder to find your key https://www.magicaljellybean.com/keyfinder/

Then use the following procedure to update to Windows 10. https://support.microsoft.com/en-us/windows/create-installation-media-for-windows-99a58364-8c02-206f-aa6f-40c3b507420d