It's been a while since I touched a DELL. continue to hit F1 during PC reboot. This should take you to the BIOS screen. You should see the name of your DVD player. Click on it and verify that it is set to AUTO detect. Save and exit from BIOS. Exact procedure may vary slightly but you could ask DELL support to help with this.
Go into Device Manager, under IDE controllers and delete both primary and secondary channels. Reboot and windows will reload. Recheck each channel to verify that they are running in DMA mode. If this doesn't work, then you need to reload PowerDVD. Better yet, reload windows, including PowerDVD.
Sounds like a poorly configured PC from DELL.