: This system component detects when you plug in a device and tries to find a matching driver package.

: If Windows shows "PNP0500" with a yellow exclamation mark in the Device Manager , it means the system recognizes the hardware as a serial-capable device but cannot find the specific software (driver) required to make it work. Common Causes for Portable Devices

PNP0500 is a generic Plug and Play (PnP) ID assigned by Microsoft to identify .