Pnp0ca0 [repack] Here

Right-click the Windows Start menu button and open .

Because PNP0CA0 relies entirely on the system's Embedded Controller, a standard software reboot rarely clears stuck hardware registers. A hard physical power cycle resets the controller's logic: Shut down the computer completely.

showing under "Other devices" with a yellow question mark. "Unknown Device" with Hardware ID ACPI\PNP0CA0 . pnp0ca0

If you see in your Device Manager (often under "Universal Serial Bus controllers") with a yellow exclamation mark, it typically indicates:

Reconnect your power source and boot into Windows. Check the Device Manager to see if the error has cleared. Step 2: Update the System BIOS/UEFI Right-click the Windows Start menu button and open

Power Delivery (PD) negotiation, Alt-Mode switching, Data/Power role swaps

If using a laptop with an internal battery, press and . showing under "Other devices" with a yellow question mark

Enabling protocols like DisplayPort or Thunderbolt over the USB-C connector.

Generic Windows drivers may not suffice. The most reliable drivers come from your computer manufacturer (e.g., Dell, HP, Lenovo, Asus, MSI). Visit the official support website for your specific laptop or motherboard model, download, and install the latest , BIOS , and Thunderbolt/USB-C drivers.

Do not delete the driver software if prompted; simply click .