In a similar manner, when I turn on the computer from a cold boot or after a long period of sleep, I see that the adapter has been stopped by Windows 8.1 Pro "because it has reported problems. (Code 43)". I have found the same work-around - disable/enable the adapter. But I also use a bluetooth mouse, and when I activate bluetooth, it drops the wifi connection. My configuration:
- Lenovo Thinkpad X1 Carbon (March 2014) with recent BIOS update
- Windows 8.1 Pro
- intel Dual Band Wireless-AC 7260
- Intel Wireless Bluetooth 4.0 + HS Adapter
- Intel Pro-set Wireless Driver 17.12.0
- Intel Pro-set Bluetooth driver /patch 17.0.1405.0464
If I turn off bluetooth and again disable / enable, then the adapter connects to the WiFi.
Even when it connects, the fastest rate on my a/b/g/n network is 39 Mbps. My old (2008) XPS with an Intel Wifi Link 4965AGN connects at 117 Mbps.
I also reset the computer back to factory conditions and re-loaded everything carefully. I also made sure I loaded the bluetooth driver before the Wireless driver as per the Intel website on the bluetooth 4.0 + HS adapter.
Next step is to return the computer to the Microsoft Store and try to find a replacement ultrabook similar to the X1 without this adapter.
