Like I said, I've got a dual boot setup. It worked fine in both drives, prior to my reloading both drives. Although, prior to that it was acting up in XP and working fine in Vista. I just bought a new DVD drive and installed it last night. It did not work in Vista either. I get this message: IRQ_NOT_LESS_OR_EQUAL_TO and this 0x000000d1 (0x00000464, 0x00000002, 0x00000000, 0x82524f01), as well as this ataport.sys- address 82524f01, base at 82519000, datestamp 47918f74. I get this message when I insert any disk in the drive.