I have the same problem, with a N7260 card on my LenovoS540 laptop. Apparantly my driver got updated, and after that, it only could reach half the distance of before, is slower, easily falls off, and are difficult to log on again (if signal is 3 pins, and impossible at 2 or lower pins).
I have naturally tried to roll back the driver, with no result. Even 5-6 generations of drivers back. Also I have tried to update drivers several times, but it still do not function satisfactory.
Judging from this forum, it is a very common fault, and something Intel has know for over half a year, without doing anything about it
I understand your trouble and I am sorry you are having this problem. Please note there is a thread related to this topic so I would like you to post your question and report your issues on that thread so we can continue with the assistance there.
Here is the link:
The link that you reference has 179 replies with no real answer. Please provide specific and brief information or don't reply. I am having the same issue as tomfree and Thomas. I have Dual Band Wireless Ac7260, version 18.104.22.168 and my connection is interrupted and at times states "Limited." I have tried everything, including having a GeekSquad representative out to my house to fix the problem. All he did was go to Intel.com and update my version. It worked fine for a few days and now the problem is back. I will be returning my Lenovo if a VALID response is not sent soon.