I'm not familiar with your burner or with InterVideo Home Theater but it sounds to me that you have burned some of the installed files not what you downloaded.
After you had downloaded did you install the program(s) or did the installer automatically start. If the latter then it might be better if you go back to the supplier and ask for a second download for free.
To try to better explain what I'm saying, you have no way of knowing what the installer actually did, how many files it installed and where, and if it added registry entries. So when you went to C:\Program Files "and then added all the Intervideo folders I saw" you had no way of knowing if you had actually added all the Intervideo folders/files, some of which may have been installed at other locations.
Best try to explain your problem to the supplier and throw yourself at his/her mercy and if they come to the party watch very carefully what the download does and, if possible, save the downloaded file(s) to a known location from which it/they can be retrieved for burning as backup.
Good luck