A: Your router may be broadcasting only 5 GHz. The UWA-BR100 is 2.4 GHz only. Enable 2.4 GHz on your router or connect to a dual-band SSID.
After following any method above, verify success:
Note: The UWA-BR100 does not support 5 GHz Wi-Fi or WPA3. Ensure your router broadcasts a 2.4 GHz SSID. sony usb wireless lan adapter uwabr100 driver windows 10 upd
Unless you already own the adapter and like tinkering, buying this specifically for Windows 10 is a poor choice. For $10–15, you can get a modern USB Wi-Fi adapter with official Windows 10/11 drivers, 5 GHz support, and better stability (e.g., TP-Link, Panda, Netgear).
Rating for Windows 10 usability: ⭐⭐ (2/5) – Works only with manual driver installation and has reliability issues. A: Your router may be broadcasting only 5 GHz
| Pros | Cons | |------|------| | Can work with manual effort | No official Windows 10 driver | | Good for basic browsing | Unstable with heavy use | | Cheap if found used | USB 2.0 only | | Auto-detects on some builds | No 5 GHz, no AC, no AX | | | May stop working after major Windows updates | | | Not plug-and-play for most users |
Sony sold its PC business (Vaio) in 2014, and the UWA-BR100 was phased out around 2012-2013. By the time Windows 10 launched in 2015, the adapter was considered legacy hardware. Sony’s support site only provides drivers for Windows 7 and Windows Vista. Note: The UWA-BR100 does not support 5 GHz Wi-Fi or WPA3
However, Microsoft Windows 10 includes a generic driver for the USB\VID_0CF3&PID_9271 hardware ID (Atheros AR9271), which is the core of the UWA-BR100. The challenge is getting Windows to use that driver instead of failing with an error.
There are no real driver updates for Windows 10. What people call “updates” are just forcing older drivers to install.
Do not expect:
Sometimes Windows 10 already has the generic database for this chipset built-in.