I was previously using a windows vista OS, i started noticing that my dvd drive only read dvds and didn't read cds so I formatted the system and newly installed a windows 7 OS on my system and after doing that my dvd rw drive was functioning fine then suddenly the same problem surfaced after some time(reading only dcds nd not cds). But as time went on my computer could not detect the dvd rw drive at all.
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