The hardware ID refers to the Standard PC Keyboard (specifically the 84-key or AT-style keyboard). When this appears in Windows 10, particularly on portable devices like laptops or tablets, it usually indicates a driver conflict or a generic identification of the built-in keyboard. Troubleshooting the PNP0500 "Standard PS/2 Keyboard"
Many portable USB-to-serial adapters require specific third-party drivers, such as the FTDI USB Serial Port driver , to function as a PNP0500 device. Common Port Assignments Hardware ID Common Usage COM1 / COM2 Standard Serial Port COM3 / COM4 16550A-compatible Port Are you trying to connect a specific device pnp0500 windows 10 portable
Then reboot.