I thought I just found it but I can't fix it. In Device Manager under IDE controllers, there's primary IDE controller and secondary IDE controller. In primary, under Advanced Settings, there's Device 0 and Device 1. Device 1 current transfer mode says Ultra DMA Mode 6. Device 1 says current transfer mode = Not Available. In secondary IDE Channel Properties, under Advanced Settings, Device 0 current transfer mode says Ultra DMA Mode 1, and Device 1 current transfer mode = PIO Mode (even though I tried changing the Transfer Mode to DMA If Available and then restarting - it still says PIO Mode).
I know when I first had this computer I had to change something to DMA mode to get the DVD working and it was fine.
I know when I first had this computer I had to change something to DMA mode to get the DVD working and it was fine.