The root cause is almost always a missing or incomplete firmware identifier. Most reputable Bluetooth chips (from Intel, Realtek, or Broadcom) have unique Vendor IDs (VID) and Product IDs (PID). When you plug in the device, Windows queries these IDs and matches them to an .inf driver file.
Never download drivers from Google Drive or third-party "driver update" sites. Use only: Windows Update via your PC Settings.
If automatic search fails, manually switch the system driver package.
Without the proper driver, you may experience reduced range, inability to pair devices, or the Bluetooth feature not appearing at all. Common Issues with Uac Demo V1.0 Bluetooth Driver
