Once you have the driver file (usually a .zip or .exe ), follow these steps:

A free, open-source driver pack tool. Download only the "Bluetooth" pack. This often finds legacy drivers that Windows Update ignores.

If the driver installer refuses to run, use Compatibility Mode (right-click installer → Properties → Compatibility → Run as Windows 10).

Let me know your exact X550L submodel (check the sticker on the bottom) if you need a direct driver link.

Troubleshooting tips