fitnessman

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Joined
Aug 24, 2009
Messages
2
hi guys, i have no cd rom devices found on my installation.,
i have tried the regedit hack found on the internet for vista (this is the windows 7 RC im using) which was to delete the upper and lower filters in the cde rom registry then reboot, but this has no effect.
windows 7 does not recognise any cd rom device exists in device manager, disk management, devices or printers but is listed in the registry when i use regedit. also in xp mode there is a cd rom drive found in my computer making me suspect its a driver issue for windows 7 (to be expected on an RC). i am using the RC as a primary install now due to vista being so bad is there any known work around or alternate generic divers i could use please
my device is a lite-on lh-20a1h and i am using 64-bit windows 7 ultimate RC?
 

Solution
It seems like you're facing an issue with CD ROM devices not being recognized in your Windows 7 Ultimate RC installation. This could indeed be a driver issue, especially with an RC (Release Candidate) version of the OS. Here are some steps and workarounds you can try to resolve this problem:

Steps to Troubleshoot and Resolve CD ROM Recognition Issue:​

  1. Update Drivers:
    • Check for updated drivers for your Lite-On LH-20A1H CD ROM drive that are compatible with Windows 7.
    • Visit the Lite-On website or the manufacturer's website to download and install the latest drivers specific to Windows 7.
    []Device Manager:
    • Open Device Manager and look for any yellow exclamation marks next to the CD ROM...
It seems like you're facing an issue with CD ROM devices not being recognized in your Windows 7 Ultimate RC installation. This could indeed be a driver issue, especially with an RC (Release Candidate) version of the OS. Here are some steps and workarounds you can try to resolve this problem:

Steps to Troubleshoot and Resolve CD ROM Recognition Issue:​

  1. Update Drivers:
    • Check for updated drivers for your Lite-On LH-20A1H CD ROM drive that are compatible with Windows 7.
    • Visit the Lite-On website or the manufacturer's website to download and install the latest drivers specific to Windows 7.
    []Device Manager:
    • Open Device Manager and look for any yellow exclamation marks next to the CD ROM drive.
    • Right-click on the CD ROM drive and select "Update Driver" to manually update the driver software.
    [
    ]Compatibility Mode:
    • Try running the driver installation in compatibility mode. Right-click on the driver setup file, go to Properties, and choose the Compatibility tab. Select an earlier version of Windows like Vista or XP.
    []Check Registry Settings:
    • Verify that the registry settings are correctly configured:
      • Open Registry Editor (regedit).
      • Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}.
      • Check for "UpperFilters" and "LowerFilters" entries. If they exist, delete them.
      • Restart your computer after making changes and check if the CD ROM is recognized.
    [
    ]Default Drivers:
    • Windows 7 generally provides default drivers for optical drives. If the specific driver isn't working, try uninstalling the existing driver in Device Manager and letting Windows reinstall the default driver upon restart.
    []BIOS Settings:
    • Ensure that your BIOS settings are correctly configured to detect the CD ROM drive. Check if the drive appears in the BIOS.
    [
    ]Check Hardware Connections:
    • Ensure that the CD ROM drive is correctly connected to the motherboard with power and data cables. Try re-seating the connections.
  2. Third-Party Tools:
    • Consider using third-party driver update tools to scan for and automatically update any missing or outdated drivers.

      Additional Notes:​

      • Since you are using a pre-release version (RC) of Windows 7, compatibility issues are expected. It might be challenging to find specific drivers for this version.
      • Make sure to back up important data before making any significant changes to your system.
      Try these steps to see if they help in recognizing your Lite-On LH-20A1H CD ROM drive in Windows 7 Ultimate RC. Let me know if you need further assistance or if you encounter any issues during the troubleshooting process.
 

Solution
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