"The computer is unable to discover or connect to Bluetooth devices" with some Bluetooth adapter drivers from Qualcomm and Realtek. We have one report which suggests that this might also affect Windows 10 - 1809.
Check with your device manufacturer (OEM) to see if an updated driver is available and install it.
- For Qualcomm Bluetooth adapter drivers, you will need to install a driver version greater than 10.0.1.11.
- For Realtek Bluetooth adapter drivers, you will need to install a driver version greater than 1.5.1011.0.
Source: https://docs.microsoft.com/en-us/windows/release-information/status-windows-10-1903
Unable to discover or connect to Bluetooth devices
Microsoft has identified compatibility issues with some driver versions for Bluetooth radios made by Realtek and Qualcomm. To safeguard your update experience, we have applied a compatibility hold on devices with affected driver versions for Realtek or Qualcomm Bluetooth radios from being offered Windows 10, version 1903 or Windows Server, version 1903 until the driver has been updated.
Affected platforms:
- Client: Windows 10, version 1903
- Server: Windows Server, version 1903
Workaround:
Check with your device manufacturer (OEM) to see if an updated driver is available and install it.
- For Qualcomm drivers, you will need to install a driver version greater than 10.0.1.11.
- For Realtek drivers, you will need to install a driver version greater than 1.5.1011.0.
Note Until an updated driver has been installed, we recommend you do not attempt to manually update using the Update now button or the Media Creation Tool.
Next steps: Microsoft is working with Realtek and Qualcomm to release new drivers for all affected system via Windows Update.