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Guided Help to delete the UpperFilters and LowerFilters registry values that can cause CD access problems
Note We recommend that you uninstall all CD recording or CD writing programs before you delete the UpperFilters and LowerFilters registry values. You can reinstall any programs that you use after you resolve this problem.
Guided Help is available to delete the UpperFilters and LowerFilters registry values that can cause CD access problems. Guided Help can automatically perform the steps for you.
The actions that this Guided Help performs can be undone after Guided Help is finished. To undo this Guided Help, run Guided Help again. On the Welcome page, click Undo this Guided Help, and then follow the instructions.
For more information about Guided Help, click the following article number to view the article in the Microsoft Knowledge Base:
) Description of Guided Help for Microsoft Knowledge Base articles
Requirements to install and to use this Guided Help
You must be logged on to Windows by using a computer administrator account to install and to use this Guided Help.
You must be running Windows XP Home Edition, Windows XP Professional, Windows XP Media Center Edition, or Windows XP Tablet PC Edition to install and to use this Guided Help.
You must first download Guided Help. To start, click the following link.
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Manual steps to delete the UpperFilters and LowerFilters registry values that can cause CD access problems
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
To manually delete the UpperFilters and LowerFilters registry values, follow these steps: 1. Start Registry Editor (Regedt32.exe).
2. Locate the UpperFilters value under the following key in the registry:
3. On the Edit menu, click Delete, and then click OK.
4. Locate the LowerFilters value under the same key in the registry:
5. On the Edit menu, click Delete, and then click OK.
6. Quit Registry Editor.
NOTE: After you remove the Upperfilters value and the Lowerfilters value, if you notice lost functionality in a particular program, such as CD recording software, you may need to reinstall that software. If the problem recurs, consult with the software vendor for assistance.
7. Restart your computer.
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This is a known issue that can occur when you remove Easy CD Creator version 5.01 or earlier or DirectCD version 3.01c or earlier. This issue may also occur with Easy CD Creator version 5.01 and with DirectCD 3.01d or later.
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For more information about this similar issue, click the following article number to view the article in the Microsoft Knowledge Base:
) CD-ROM drive or DVD-ROM drive appears to be missing after you install Windows XP or Windows Vista Beta 2
There may be other third-party CD-writing software products that exhibit similar behavior. Some or all of the troubleshooting steps in this article might apply if such a product also adds entries under the UpperFilters or LowerFilters value in the registry, either by adding its own filter drivers or by removing the registry keys and values outlined in this article that begin with:
Warning Make sure to back up the registry before making any changes.
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.