The Sony UWA-BR100 USB Wireless LAN Adapter does not have official, manufacturer-provided Windows 10 drivers because it was designed exclusively for Sony Bravia TVs, Blu-ray players, and Home Theater systems.
Because the UWA-BR100 uses a common chipset (often Atheros or Buffalo-based), some third-party driver repositories offer compatible files. The Sony UWA-BR100 USB Wireless LAN Adapter does
: Sony explicitly states that there are no driver downloads available for Windows systems. The Sony UWA-BR100 USB Wireless LAN Adapter does