Hi there,
I have exactly same issue with HL-DT-ST DVDRAM GSA-T20N ATA Device, use Acer Extensa 5420 with Vista + SP 2.
I dont know when CD ROM stopped working as dont use very often so couldnt do sys reboot.
Unfor I ddint see this and uninstalled device driver :(
Saw msg from Wolfymole 15-12-2008, 10:15am, im not comfortable with registry manually and couldnt dload the zip file.
Anyway hope someone can help.
Many Thanks,
James K