@engineer,
While I've got you on the phone.
You might be able to help me engineer.
I had ATT U-Verse for 2 years and my 3 laptops, PC and I Pad worked fine in wireless mode.
As soon as I switched to Comcast cable the I Pad worked but the computers would drop the internet signal every few hours.
Then I would have to reboot or repair.
Tech guys at ISP said modem-router worked fine from their end and rather smugly told me to get new drivers for the cards.
Got any ideas?