Hi Charles.
What was the UpperFilters value you deleted (What was under Value data that was removed)?
That may make it easier to explain what may have happened in your case.
The UpperFilters and/or LowerFilters value(s) load filter drivers for a device.
These filter drivers add functionality to software, such as CD/DVD burning software.
If an UpperFilters and/or LowerFilters value exists and there is no corresponding filter driver or a corrupted filter driver exists on the system then the error would occur.
This may happen when a software gets uninstalled leaving the UpperFilters and/or LowerFilters value(s) behind but removes the corresponding driver(s).
The following link gives a good summary on filter drivers:
http://www.techspot.com/community/topics/cd-dvd-or-disk-problems-how-to-fix-problems-caused-by-filters.137666/