I have tried the Copy-Clone mode as well to create an ISO copy, but I still get multiple read errors on 4K discs. I can read Blu-ray discs just fine. I have read that Windows 11 does have some thread issues and issues with AMD processors. This issue of ripping 4K discs didn't start until I upgraded to Windows 11, so perhaps it is how Windows 11 handles the reading of the disc. Just to make sure it wasn't just isolated to an upgrade to Windows 11, I have since performed a fresh install of Windows 11 from scratch, no upgrade, and still getting the same issues with two different 4K players. Once the frame rate drops below 20 frames a second, the rip usually fails. At his point, I will postpone ripping 4K discs until Microsoft issues another round of patches to see if that resolves the issue.