Hi - have you AHCI enabled in the bios? If so it could be the
driver Microsoft installs automatically during install - to fix this go to the below site and download and install the Intel Rapid Storage Technology
Driver if you haven't already installed it.
I think its updated with the chipset
drivers now, so you could update them firstly, and see if that fixes the problem if not install the rapid storage
driver - available on the same support page below.
ASUSTeK Computer Inc. -Support- Drivers and Download P8P67 PRO
You could try this microsoft fix if you have the rapid storage driver already installed assuming its suitable :
Your CD or DVD drive can't read or write media