Here's the deal, I got tired of dealing with this issue, so I backed up my computer and re-formatted the whole thing and re-installed my operating system. This fixed the issue as far as I can tell with MOST of the files that I wanted to convert. Some of them are still giving me the error message as before. I am attributing this to file corruption, so I decided to just delete the files that won't work. I also seem to remember the only system change that took place around the time I encountered this issue was that Java ran updates and installed the newest version, so I think that either that caused it, or the files became corrupt somehow (which is odd because I was able to convert other files that came from the same exact source). For your reference, I am running Windows 7 Ultimate with 4.00 GB RAM and my CPU is Intel Core 2 Quad Q6600 @ 2.40GHz. As of right now, I no longer need help with this problem since it doesn't seem to be going anywhere, if I encounter this problem again, or another one, I will contact Support. Thank you for trying to help.
John