PnP

Plug and Play is the Windows framework that detects hardware, assigns resources, chooses a compatible package, and starts the device without manual jumper or interrupt settings. It runs when you connect USB hardware, add an expansion card, or boot with a new internal component. Device Manager shows the result of that process, including Unknown device entries when no trusted INF matches the reported hardware IDs. Unplugging and scanning for hardware changes can repeat enumeration, but it cannot create missing software. Copy the device's top hardware ID, identify the exact PC or component model, and install its trusted package. Repeated connection sounds usually point to power, cable, or contact trouble rather than to Plug and Play itself.