HP 8710w El Capitan

Hello all,

First sorry if this is a duplicate or has been answered but I've searched and tried many, many things but I still have troubles getting my laptop run El Capitan. Either I don't understand something or I'm missing some essential parts of the installation process.

I'm trying to install El Capitan to this laptop:
HP Compaq 8710w
Chipset: Mobile Intel PM965
CPU: Intel Core2Duo @ 2.4
RAM: 4GB
NVIDIA Quadro FX 1600M

I know it's a quite old machine...

HP 8710w El Capitan