Many older ICH7 chipset drivers as well as generic derivers has been removed from the winodws Latest Built, for you it it seems the cd/dvd rom drivers are missing.
I here give the link uploaded by me, which contains the driver for CD/DVD ROM fro windows 7, Please open device manager and manually locate the CD/DVD rom and select the .inf file to install the driver
Please leave me comment, if you need further assistance
Rename CD-ROM Drive.txt to CD-ROM Drive.rar!
Try the Intel package(link posted before), that's an Intel mobo.