Disable or Enable DMA options:
Go to control Panel and choose system - go into device list- select your dvd drive and use double click on it or one click and ask for properties, you'll have something like of 3 guides, if i'm not wrong is in the "configuration guide", you'll have the DMA option, and other options like choose the if your DVD unit will be E: or D: or F: or G: and ect.
