If you are replacing an old broken adapter with a new dongle, go to Settings > Devices > Bluetooth and remove all old paired devices before trying to pair them again with the new adapter.
Sometimes the Bluetooth driver won't install because the main motherboard (Chipset) drivers are outdated. Visit your laptop manufacturer's website (Dell, HP, Lenovo, etc.), search for your specific model, and download the latest Chipset and BIOS updates. how to install bluetooth in laptop
🛠️ Step 2: Install Bluetooth via Software (Hardware is Present) If you are replacing an old broken adapter
Very few laptops allow you to physically install an internal Bluetooth card (except via replacing the Wi-Fi/Bluetooth combo card). go to Settings >