Yoga 2 Pro - Wireless Card not Detected by Windows 8.1

Hi, Just got a refurbished Yoga 2 Pro. The first time I started the system up, the wireless showed up and I connected to my local WLAN. However, few minutes later the wireless dropped out. The issue was that Windows stopped detecting the card. Not showing in the device manager. Strange enough the bluetoth was working fine. The card is an Intel 7260NGW. I thought it was the card, so I replaced it with a new Intel AC7260NGW. The same result. I've removed & reinstalled all drivers including the ones from the Intel website. I've formatted and installed a fresh version of windows 8.1 and reinstalled all drivers again. Not to avail. Now running with an USB wireless adapter.  Any clue what's going on? Thanks in advance guys Daniel

OMG, I was just about to buy a new wireless card because I have the same problem.
Some weeks ago my wireless adapter disappeared, the card disappeared altogether even from Device manager, after I installed a new bluetooth driver and after I was connecting to my phone 3G via USB cable.
But then it came back after I left the laptop shut down and unplugged for a whole night. It worked for a few hours and after closing the lid and opening it again wireless adapter was gone again, never to come back.
I tried changing drivers, holding the power button for 20 sec to hard reset the laptop, fresh install of Windows, load BIOS defaults, and even installing Windows 10 in VHD (dual boot) and see if it will reappear there.Always the same - the wireless adapter doesn't exist any more.
However, buetooth has been working without problems, which I find strange.
I read online about similar situations, and all answers point that the wireless card stopped working and needs to be replaced.
But @Papelinas - you say you even bought and installed a new wireless card and STILL have the same problem???I can't believe that something in motherboard got damaged and that only wifi doesn't work...
I've had my Y2P for 6 months, and I don't really have time to send the laptop for repair for some time, I'm using it...
I guess I'll still try to buy a new card, and just hope the wireless adapter will reappear...

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