With Windows 8.1, there is indeed a stable Wi-Fi connection, which is not recognized by all RT-Apps. They therefore deny the use:
- Card App
- Store
- Video
- Music
By contrast, the IE11 and the Mail app works.
It's sad to see that one is left from AVM so down. The Fritz boxes that get the better way.
While there are unofficial instructions with Atheros drivers have it but yet do not get me.