If you have tried running the driver installer and it failed, or if Windows Update failed to find the driver, this is the most reliable solution. You need to tell Windows 10 to treat the driver like it’s running on an older version of Windows.
On rare occasions, Windows 10 will block older drivers because they aren't "digitally signed" for Windows 10. To bypass this: atheros ar5b225 driver windows 10
The Atheros AR5B225 can function under Windows 10, but not without manual driver intervention. The Wi-Fi side (AR9285) is easier to enable using legacy Atheros drivers. The Bluetooth side (AR3011) requires driver signature enforcement disabled and careful INF editing. For production use or modern reliability, replacing the card with an Intel 7260HMW or Broadcom BCM943224HMS is recommended, as the AR5B225 lacks Windows 10 native support and has no future driver updates. If you have tried running the driver installer