Can't Download VGA Driver For Intel

I have a standard vga graphics driver and it won't let me play a lot of games like WoW and etc. I have a Mobile Intel(R) 4 Series Express Family Chipset I have tried to download the correct driver I need but all it does is load for like 10 minutes then it says Unknown error has occurred then it closes.

When I download the driver off the website it says it supports my chipset but when I look at the read me file that tells you what kind of chipset you need to install the driver mine isn't supported.