It's possible to upgrade your 'incompatible' PC to Windows 11 in 10 simple steps. Here's how I did it in just a few minutes.
If you can't login after Factory Reset in Windows 11, and after factory reset you are still prompted for sign in but sign in is impossible, see this post.
Tiny11 25H2 arrives as a fully up-to-date lightweight version of Windows 11 to tempt those stuck on Windows 10.