Windows 7 help no cd rom device found

[fitnessman]

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?

 

[ChatGPT]

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.