Error 3 suggest a path for a Mezzmo program file or associated file has not been found. It's best we see a set of logs so we can tell you what has gone wrong with your re-install. Turn on logging in Mezzmo (see http://forum.conceiva.com/showthread...nostic-logging). Exit Mezzmo (Windows) app and then run it again. Now try to start your Mezzmo server. When it fails to start, exit Mezzmo (Windows) app. Zip up all the logs and email them to us at support [at] conceiva [dot] com.