I just upgraded my Samsung ATIV smart PC tablet from Windows 8 to Windows 8.1. I should have checked the web before doing this. The WiFi driver for the Intel Centrino Advance-N 6235 would no longer connect to any networks. The after-upgrade installed driver is version 220.127.116.11 from Intel. I found “version” 16.7.0 for Windows 8.1 at the Intel website. I went for the file Wireless_16.7.0_De164.exe; downloaded and copied it to a USB stick and ran it on the Samsung. Double-clicking on the driver executable launched a strange WiFi image with green cycling dots which closed without saying it did anything. I was expecting it to extract driver files. When I looked at the driver version it was updated to version 18.104.22.168. According to Intel, I have the right version but I was still unable to connect. Doing some more Googling, I found this link. I followed steps 1 (uninstall old Intel PROSet/Wireless Software); and 2 (install newest driver); and 3 (turn off “Allow the computer to turn off this device to save power”)…No luck! I needed to turn off the UPnP on the router.
With all this pain I am tempted to wipe the Windows 8.1 OS and load Linux.