Now it's time to see if deleting the UpperFilters and LowerFilters registry values solved your problem.
Chances are, you're walking through this tutorial because deleting these values is a likely solution to a device manager error code, something you investigated after some piece of hardware quit working properly.
If that's true, then checking the device's status in Device Manager and making sure the error code is gone is a good check to see if this process worked. Otherwise, just check the device and see if it's working properly again.
Important: As I mentioned in the first step, you might need to reinstall programs associated with the device you removed the UpperFilters and LowerFilters values for. For example, if you removed these values for your DVD drive, you may have to reinstall your DVD burning software.
Did the error code remain or do you still have the hardware problem?
If deleting UpperFilters and LowerFilters didn't work, return to the troubleshooting information for your error code and continue with some other ideas. Most Device Manager error codes have several possible solutions.
Having trouble finding the correct GUID for your hardware? Still confused about deleting the UpperFilters and LowerFilters values?
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