Once Registry Editor is open, locate the HKEY_LOCAL_MACHINE registry hive.
Expand the HKEY_LOCAL_MACHINE hive by clicking the |> to the left of the folder icon. In Windows XP, it will be a (+) symbol.
Step by Step Guide to Deleting the UpperFilters and LowerFilters Registry Values
By Tim Fisher, About.com Guide
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- Click on the Start Button
- Open Registry Editor
- Click on HKEY_LOCAL_MACHINE
- Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class
- Expand the Class Registry Key
- Determine and Click on the Correct Class GUID
- Locate the UpperFilters and LowerFilters Values
- Delete the UpperFilters Value
- Confirm Deletion of the UpperFilters Value
- Delete the LowerFilters Value
- Confirm Deletion of the LowerFilters Value
- Close Registry Editor
- Restart Your Computer
- Wait While Windows Restarts
- See if Deleting These Registry Values Solved the Problem
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- Click on HKEY_LOCAL_MACHINE (Step 3 of 15)