Nasty thing. I've never heard of it. I have a few lists of common processes that run on Windows and it doesn't appear. Also did a search, and nothing.

What Windows do you have? I say get a better AntiVirus like Norton (I've never been a fan of McAfee) Make sure it's up to date. Have you searched your registry to see if it's being called from there? Also, for now, try putting an empty file in that directory where it copies to and name it isle.exe. Make it readonly and hidden so it doesn't try to copy itself there and try to overwrite. But who knows, the trojan or virus you got might be smart.

Also, try to open the exe file in notepad and see if you can find any readable words that might help your search.