I am also having this problem when trying to use Intel Wi-Fi cards as a soft-AccessPoint when configured in 802.11a only mode (5 GHz)
I have tried the following cards with the latest drivers Wireless_17.1.0_De164.exe using a fully patched Windows 8.1 Pro 64-bit o/s:
- Intel Centrino Advanced-N 6200
- Intel Centrino Advanced-N 6235
- Intel Wireless AC-7260
All are dual-band cards. All operate correctly as a soft-AP in 802.11b, 802.11g or 802.11n modes (2.4 GHz), but none in 802.11a only mode (5 GHz).
The cards are capable of operating as a soft-AP at 5 GHz as if I configure into 802.11 a/b/g/n mode, and then manually attach as a client to a 5 GHz Wi-Fi network, then the card will operate as a 5 GHz soft-AccessPoint correctly.
Any ideas???