For many Vaios, the Windows 8.1 64-bit Bluetooth driver is binary-compatible with Windows 10. By downloading the original driver from Sony’s legacy support site (via the Wayback Machine or third-party archives), running the installer in Windows 8 Compatibility Mode, and disabling driver signature enforcement temporarily, users can often succeed. The key file is usually btfltcoinst.exe or BroadcomBluetoothDriver.exe .
Newer models are supported directly through the VAIO USA Support portal . Step 2: Locate and Download the Driver Drivers and Software updates for Personal Computers - Sony sony vaio bluetooth driver windows 10 64 bit