I got KB5007264-x64 from
https://uupdump.net/findfiles.php?id=6dedc052-e4e5-451b-a339-e982591a5a9a&q=Windows10%20KB
but it threw an error near the end when updating
22000.346 to 348
I just got a very interesting response when Windows 10 updates was checking a Core2 Quad machine without secure boot for Windows 11 compatibility
"
We're working on it
We're doing some extra testing to make sure Windows 11 is ready for certain PCs--yours included.
"