I had the same problem using an AC7260 on Win 8.1 and I solved uninstalling all Intel wireless solution (software + drivers) and installing only the drivers package (17.0.3.2).
Give it a try and see if it works for you.
I had the same problem using an AC7260 on Win 8.1 and I solved uninstalling all Intel wireless solution (software + drivers) and installing only the drivers package (17.0.3.2).
Give it a try and see if it works for you.