As for the codecs being out-of-date, two parts: one, I have checked all the recent downloads for RP through it's update mechanism, and have made sure I have everything; two, I have a feeling the problem is with an update, as in RP did an auto update and something in the new version caused the sound to go away. And of course, there is no way to install the old version, because the installation process requires you to be hooked up to the internet, where RP automatically downloads and installs the most recent version. Have I mentioned before that I hate RP?
Thank you for the help, I hope someone can come up with someway for me to get sound back. As of right now, I can download shows, but it does me no good. There are no subtitles, I have no sound, and I can't read lips.