If you still cannot fix the driver, consider that Windows 7’s Bluetooth stack is reaching its practical limit. For critical Bluetooth use, upgrading to Windows 10 or 11 (or replacing your Bluetooth dongle with a modern one that includes Windows 7 drivers) is the more reliable long-term solution.
Though Windows 7 reached end of life (EOL) in January 2020, update servers still host many driver packages. microsoft bluetooth enumerator driver for windows 7 download
