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Step by Step Guide to Deleting the UpperFilters and LowerFilters Registry Values

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Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class
Class Key Selected in Registry Editor

Class Key Selected in Registry Editor

Continue to expand registry keys and subkeys until you reach the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class key.

Click on the Class key once. Registry Editor should look similar to the screenshot above.

Important: If you're going to play it safe and backup the registry keys you're working with in this tutorial (which I do recommend), the Class key is the one to backup. See How To Backup Registry Keys for help.

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