Check the CASIO OS Compatibility Page to verify if your specific model is listed as "Compatible" (no driver needed) or "Compatible with driver."
You should see listed if the driver is working correctly. 3. Troubleshooting Common Issues Connecting to a Computer or Smart Device and Using MIDI casio usb midi driver windows 10 64 bit link
Many newer CASIO keyboards (CT-Series, PX-S series, 2020+) are USB-MIDI class compliant and do NOT need a driver on Windows 10. Check the CASIO OS Compatibility Page to verify