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If you cannot find a Windows 10-compatible driver, you might consider using a universal wireless adapter driver if available, or reaching out to Sony support directly for further assistance.
It’s a USB wireless LAN adapter (802.11 b/g/n) released around 2010–2012, often bundled with Sony Blu-ray players, TVs, or cameras (like the NEX series). It uses a Ralink RT2870 chipset. If you cannot find a Windows 10-compatible driver,
Hardware Overview:
Why Windows 10 doesn’t recognize it automatically: Windows 10 has a massive built-in driver library via Windows Update, but many legacy devices—especially those from consumer electronics brands like Sony (not a pure networking hardware maker)—were overlooked. The UWA-BR100 uses a Realtek chipset. Since Microsoft stopped bundling unsigned or legacy Realtek drivers after the Windows 10 Anniversary Update (version 1607), the adapter becomes an "Unknown USB device" or shows a yellow exclamation mark in Device Manager. Hardware Overview:
Good News: Because the chipset is standard Realtek, a generic Windows 10 compatible driver exists for free—just not from Sony. Why Windows 10 doesn’t recognize it automatically: Windows
The secret to using the Sony UWA-BR100 on Windows 10 lies in its internal hardware. This adapter uses a Broadcom chipset. While Sony stopped updating the "Sony" drivers years ago, the generic Broadcom drivers for the internal chipset are fully compatible with Windows 10.