I'm sorry, but I don't understand why you deleted my answer on the following topic:
How to change the theme of Windows 8 to the classic theme?
It was just about to warn everyone, that a file is NOT what it supposed to be, and that it contains a virus. Please, undo the deletion ASAP. My message was intended to help others to maintain their safety on the net!
This does not provide an answer to the question.
If you have an additional question, then simply post a new question :)ClassicTheme.exe
(Portable Executable) is triggering the alert.