If you need a manual download for Windows 10 (32-bit or 64-bit), reliable repositories include:
In Windows 10, the OS includes a generic Bluetooth radio driver class. However, the generic driver often fails to initialize ISSCBTA hardware due to the device requiring specific firmware loading instructions during initialization that the generic Microsoft driver does not execute. isscbta bluetooth driver for windows 10 high quality work
(Released 2014), which is explicitly marked as supporting Windows 10 32-bit and 64-bit. Download ISSC USB Bluetooth Device Driver DriverIdentifier If you need a manual download for Windows