http://www.updatexp.com/sherlock-codec-detective.html

Having sound or video problems? This little gem may help.

# Determine the codecs installed on a Windows XP computer
# Check to see if any of the codec's were "BROKEN" (will be highlighted in RED….)
# Export the data to a text file for technical support!
# Was FAST to run on a PC and did NOT require installing…
# SMALL enough for download by modem!