Upgrade of OS for Casio fx-9860 Slim

[Jonas Sandstedt]

Hello, I put the calculator in OS Error mode and connected it to the PC via the enclosed USB. The computer replied that Windows did not recognize the connected device, and the fxRemote program did not find the calculator. The FA-124 linking software did not find any calculator either. Can it be the USB driver that is missing, and where can I find it in that case? I disconnected the calculator and it works as before.
Best regards Jonas