How to Remove the Upper and Lower Filters in a CD-ROM Registry

Filter drivers are non-standard registry keys that get installed with different kinds of software. For example, many different kinds of optical disc utility software, such as disc emulators, install their own filter drivers as a means of both protection and to extend the functionality of the existing Microsoft Windows drivers. Sometimes these installed filter drivers interfere with the normal operation of the device, especially if the software is not cleanly uninstalled. Removing the filter drivers in the Windows registry fixes this problem.

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Remove filter drivers in the Windows registry to regain functionality of the CD-ROM.

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Click the "Start" button in the lower left corner.

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Click "Run."

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Type "Regedit" and press the "Enter" key.

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Navigate to the following subkey with either the mouse or the keyboard:

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HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class{4D36E965-E325-11CE-BFC1-08002BE10318}

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Right-click the Upper-Filters key, if present, and click "Delete." Click the "Yes" button.

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Right-click the Lower-Filters key, if present, and click "Delete." Click the "Yes" button.

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Close the Regedit program and restart the computer.