14.04 - this installation did not install the CUDA driver

I'm currently trying to install cuda on my ubuntu 14.04. I downloaded cuda run file from nvidia: https://developer.nvidia.com/cuda-downloads?sid=908551

But i get the following error:

EDIT:
settings->software&updates->additional drivers
the options are all grayed out:

For installing cuda 1st you need to install nvidia driver as for best scenario use propitiatory nvidia driver which are in settings >> software and updates >> Additional driver.

And select nvidia 343 or nvidia 346 driver but not the lower version as for cuda.

After when you install the propitiatory driver reboot the system and install

sudo apt-get install nvidia-346-uvm or

sudo apt-get install nvidia-343-uvm or

sudo apt-get install nvidia-346-updates-uvm or

sudo apt-get install nvidia-343-updates-uvm

According to the driver you've installed and then create an alias for that uvm in blaclist files for nouveau driver by

alias nvidia-346-uvm or whichever you have installed

then update the initramfs by

sudo update-initramfs -u

then reboot and run

sudo modeprobe nvidia-343-uvm to load nvidia kernel module and then

retry to install your cuda