2nd apple thunderbolt display in not detected by Windows 8.1

Installed Windows 8.1 on a late 2013 Mac Pro.  Have two thunderbolt displays.  The 2nd display is not being detected by Windows.  There is only one display listed in device manager.  One display works fine, the river listed for it is Generic PNP display.
Any ideas on getting 2nd display to work in Windows 8.1?
Thanks

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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