Or "after a clean Windows installation, all Registry and Indexing is also clean"Let me make a positive statement: I just updated my PC from Windows 10 to Windows 11 last night, and Cubase Pro 13 is much faster, snappier, and responsive for me on Windows 11. Dramatically so.
That's what you're probably experiencing, You could go back to 10 and chances are that it will be as snappy as 11. So now that you have it pristine clean, install Revo uninstaller free and use that always to uninstall whatever you remove. You then will be left with way less registry entries, unused files and indexing fingerprint which X app had left out.