Here You can : ASRock > Products > Motherboard > G41MH/USB3 > Download
Select your OS,
It is not the Cd, as in a self executing installer package. But the individual drivers and updates like Bios for example to get you up and going.
A word of advice try not to install too many at a time install a few divers and reboot then install a few more. Install the Bios separate or run the risk of fraging your MoBo.