http://bugs.winehq.org/show_bug.cgi?id=33497
--- Comment #1 from Daniel Jelinski djelinski1@gmail.com 2013-05-01 17:30:31 CDT --- Error message was probably unrelated to missing class. After further examination I found a more likely reason (see bug 33504). Anyway, the installer reports in its logs that COM+ check returned error, so this class will most likely still need to be implemented.