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I tried installing, Ubuntu 14.04 on my HP Probook and WiFi is not working.

I tried updating my firmware to 1.127.15, still it does not work. The laptop has Intel 8260 WiFi Hardware.

Is there anything I can do to fix my WiFi?

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Please edit your question to add the result of this terminal command: lspci -nn | grep 0280. Welcome to askubuntu. – chili555 Aug 13 '15 at 15:30
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14.04 is too old for this very new device. To upgrade your WiFi drivers without upgrading all your system, you can try installing Core13 from:

https://wireless.wiki.kernel.org/en/users/drivers/iwlwifi/core_release

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I had upgraded my kernel to 4.0.5, then upgraded. Nothing had happened. I followed the instructions in the link you mentioned, the backporting stuff - rebooted, and wifi's working. Thanks a tonne! – bad_keypoints Jan 27 '16 at 6:58
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Try updating your Kernel to 4.x if it is currently on 3.19 or older, that worked for me

check kernel version with:

uname -a

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These issue will normally get fixed by upgrading the firware

sudo apt-get update

sudo apt-get install firmware-b43-installer

If the same issue reoccurs after following the above steps please do follow the command below and check for error to further proceed on this issue

lspci -nnk | grep -EA3 Ralink

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-1 What? The b43 stands for a series of Broadcom wireless adapters. This one here is made by Intel. – David Foerster Apr 20 '16 at 20:36

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