Cause: Conflicting drivers from previous wireless adapters.
Solution:
For those who prefer written simulation: sony uwa-br100 driver windows 10
After searching forums, a user finds that the UWA-BR100 actually uses a Realtek RTL8821AE chipset (Wi-Fi + Bluetooth 4.0).
The trick: use a generic Realtek driver, not Sony’s old one. Cause: Conflicting drivers from previous wireless adapters