installation - I can't install nvidia correctly

I tried to install the nvidia drivers in my laptop dell Inspiron i7 with Graphyc g-force running with Ubuntu 13.10.

I tried this commands :
apt-get install nvidia-current-updates - nvidia-xconfig
but it all ways returns me to the black screen.

Please how do I install the nvidia drivers correctly without failure (I have tried many times but they are still not working)