: A recent update or system crash damaged the driver stack.
The printer’s firmware, originally written for Windows 98, emulated a PS/2 device for legacy status reporting. But the Advanced Configuration and Power Interface (ACPI) on Windows 10 had re-enumerated the device tree during the update. It saw the vendor ID (VEN_PNP) and the device ID (DEV_0303) and politely assigned the generic i8042prt.sys —the PS/2 port driver. acpi ven_pnp&dev_0303 windows 10 driver
: Third-party software (like touchpad drivers or "Hotkeys" utilities) may be interfering with the keyboard's ability to communicate with the OS. : A recent update or system crash damaged the driver stack