I don't see any trace of this file online. Normally, if it's a relatively well-known file, if you search for it in google, you'll get something like this. With comolc.dll I'm not getting anything. At the worst, you could delete it and then if a program needed it, you can reinstall that program. But let's see if anyone else has any suggestions.
Just had a thought: Maybe you could do a search for it in regedit. I think a lot of programs list make mention of dlls they use somewhere in the registry.
(edited by Mr. Boffo on 21.10.04 0057) NOTE: The above post makes no sense. We apologize for the inconvenience.
It appears that this is supposed to be the case. Some people have reported success outputting their files to wav and re-encoding them. I have to imagine this is considered copyright infringement, however. You can burn tracks purchased at iTunes.