You can find legacy driver versions (like v1.2) on the Casio Electronic Musical Instruments Support Page .
The official driver was originally designed for older Windows versions. casio lk 300tv draiver skachat
This keyboard will not work with iPad or iPhone because it lacks "Class Compliant" MIDI support, which is required for mobile devices. Installation & Troubleshooting USB Midi driver for Windows 10 - Casio Music Forums You can find legacy driver versions (like v1