Hi Iris, let's focus on fully clearing the Bluetooth pairing cache, uninstalling the Bluetooth adapter and related hidden AirPods entries from Device Manager, then rebooting so Windows rebuilds the stack cleanly. If that still fails, the next likely causes are a corrupted Bluetooth service state, a bad recent Windows update, or interference from another paired audio device/app holding the audio endpoint.
Still need more detail? Feel free to leave a comment.