SMH5 Driver Usb not recognized resolution requires turning off Windows driver signature validation with URL

First follow these instructions to restart your system and disable Windows Driver Validation.

https://www.thewindowsclub.com/disable-driver-signature-enforcement-windows

After your system reboots:

Uninstall then Reinstall the SenaBluetoothDeviceManagerForWindows-v4.0.6-setup_x64

THEN attempt to conduct the firmware update process on your SMH5.