disc not recognized

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    Windows 7 Another 'not working DVD+/- RW'

    So here's yet another addition to what seems to be an ever-growing list of drives behaving badly. I've got two DVD drives, neither of which are working properly in 7, the main one being a Lite On (Atapi DVD A DH16A3L) SATA drive. It's a DVD +/- RW Dual Layer that was working perfectly 2 hours...