CD and DVD not detected

After I delete upperfile and lowerfile in command prompt. Then I restart the laptop. My cd rom work at the beginning, but later it not detected. I want to know how to solve those kind of problem. Please..

Thanksss :)
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More about detected
  1. what is upperfile and lowerfile?

    please explain in more detail what you mean by "My cd rom work at the beginning, but later it not detected"

    Is this windows? which version? what model laptop?
  2. "vinnyguy22 wrote :

    I HAVE THE SOLUTION.

    This happened to me and i called a dell support guy and he fixed it!!!
    This is what you do...
    Start the Run Command Prompt
    Type in "regedit" without the parrenthesis then click ok
    Go to HKEY_LOCAL_MACHINE
    Then SYSTEM
    Then CURRENT CONTROL SET
    Then CONTROL
    Then CLASS
    Then find {4D36E965-E325-11CE-BFC1-08002BE10318}
    The whole thing looks like this:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}

    Then delete the upper and lower filters....

    RESTART YOUR COMPUTER THEN THERE YA GO!!!! HOPE THIS HELPS"

    My cd/dvd hardware work at the beginning after I complete the step above. Then later like after 1 to 2 hours, my hardware not responding (not detected). My computer is Window Vista, Inspiron 1520 (model) laptop. I hope this understand you.
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