Ensure the adapter is firmly seated. Because it was designed for TVs, it sometimes draws more power than a standard USB 2.0 port provides; try a USB 3.0 port if available.
Choose and then "Let me pick from a list of available drivers on my computer" . sony usb wireless lan adapter uwa-br100 driver windows 10
Select and navigate to the folder where you unzipped the Atheros AR7010 or Actiontec driver files. Ensure the adapter is firmly seated
Select the relevant .inf file (often athuw8.inf for Windows 8/10 compatibility). sony usb wireless lan adapter uwa-br100 driver windows 10
Older wireless adapters like this may struggle with modern 5GHz networks or WPA3 security. Ensure your router supports 2.4GHz connections.