For all the people facing issues with Intel Wireless 7260 or Intel Wireless Dual Band 7260 ac cards. This is for laptops .. I don't know about desktops
I had a Yoga 2 Pro 8.1 64 bit and Intel Wireless 7260 was giving problem for connection speed and at speedtest.net . I attacked everything from my ISP -> Modem -> Router -> Laptop --> to wifi card spending 100s of hours.
There is no option but too change your cards
The steps to get it right without frustration ....
1) Get back your system to the drivers and conditions that it was before.
2) Do not install any drivers beyond 17.0.XXXX on your machine for any reason ( The Lid closing /power off issue. The card gets disabled)
3) Intel 7260n won't work whatever you do.
4) Go to this link http://amzn.com/B00GUNZUG0 and buy a 7260 dual band ac card ( Note this is for Yoga 2 Pro ). Dell etc may be different.
5) Buy a good quality Torx and Phillips screw driver set ($20 to $25) .. don't buy a cheap set as it would shear and you may have to run to get a new one in middle of the replacement.
6) Search your tube for replacing card fr your particular computer
7) Replace the card. with your battery disconnected. DON'T CHANGE ANY DRIVERS that came along with your original machine.
8) Restart the computer. ( Bluetooth won't work), Uninstall driver and Restart the machine.
9) The Lid closing issue exists in 17.1xxxxxxx.... 17.1 is getting re installed ...uninstall and delete the driver (checkbox). This will get you back to your original driver that came along with machine. YW