Have you tried installing the driver by right-click > Run as Adminstrator?
DJM-900NXS driver not seen by Windows 11
Switched from Windows 10 PC that had no issues. New PC is Windows 11 i7 2.8G 16G memory. Tried using the 1.810 and 1.800 drivers but installs weirdly with small window and doesn't see DJM. Tried Windows compatibility mode but doesn't work. CDJ-2000NXS driver works with no issues.
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Thanks for getting back to me. I think we already solved this. The request is #361228.