I think I can help you. I had the same problem. You have to "blacklist" other drivers that load and interfere with the installation of the NVIDIA driver.
The following is taken from this link:
2) Open module blacklist as admin
gksudo gedit /etc/modprobe.d/blacklist.conf
Add these lines and save:
3) Uninstall any previously installed Nvidia drivers:
sudo apt-get --purge remove nvidia-*
4) Reboot your computer
5) When an error message pops up saying that Ubuntu cannot load Nvidia drivers, choose Exit to terminal (Exit to console)
6) Login and cd to the directory where you saved your file
sudo sh NVIDIA-Linux-x86_64-195.36.24-pkg2.run
That worked for me anyway. Let me know how it turns out.