If the controller appears as “Unknown USB Device” or not at all:
: If official drivers are unavailable, third-party repositories like DriverIdentifier provide archives for specific Windows 10 64-bit builds. Installation Guide
Only if downloaded from untrusted sources. Always scan with antivirus and check the file’s digital signature (right-click → Properties → Digital Signatures).
Plug in the keyboard → Go to Settings → Update & Security → Windows Update → View Optional Updates → Driver Updates → Check for "TVS Composite USB Device". Windows may fetch a Microsoft-signed driver automatically.
If you cannot find a specific TVS driver, the TVS MSP 345 is compatible with standard ESC/P (Epson) commands.