This Broadcom Bluetooth chipset is often not correctly install, or not installed at all mainly due to appearing in the device manager in Windows as nothing but the chipset name: BCM20702A0.
The Broadcom BCM20702A0 chipset is used on a vast amount of laptops, USB Dongle adapters and much more. Hopefully the correct device driver below will fix your issues, and as always backup your system and files before attempting to install any new drivers.
Another thing that will deactivate/ uninstall this driver is Windows update especially in Windows 10 and late releases. Reinstalling the driver will fix the issue.
Below are drivers for Thinkpad and HP Laptops also a generic driver that might cover all of them.
If the device is showing a code 10 error follow the Code 10 Error guide.
Also this chipset does have issues working on Hackinosh setups, there is a Kext support that we will add below.
Lenovo device ids:
Extract the zip file to your desktop or a location that you can delete after the install. After the files are extracted run the setup.exe as an administrator.