A. Try automatic (recommended)
B. Use Device Manager if automatic fails Sony Vaio Bluetooth Laser Mouse Vgp-bms33 Driver
C. Manual driver from Sony or adapter vendor A. Try automatic (recommended)
After pairing (but before Windows auto-installs a generic driver), run the installer. It should replace the generic HID driver with the Sony-specific one. Sony Vaio Bluetooth Laser Mouse Vgp-bms33 Driver