By Nvidia 173.14.36 do you mean a brand new card or so you mean install the driver?
If 'Nvidia 173.14.36 is a driver and you have that driver sitting on your desktop on in your downloads directory just install it-
Open the terminal and run:
If the terminal tells you something like command not found it is because you must perform this task as 'root' ; put in your sudo password
apt-get install <name of driver>
This Ubuntu page should help: