The fact that info32.exe is missing is good news, the trojan is gone. Whatever you used to clean it didn't quite finish the job though as there is still a reference in the win.ini file (run=info32.exe). You need to remove references in WIN.INI and/or SYSTEM.INI and/or registry for final clean-up measures. Just edit win.ini and delete the above line ONLY, and see if the message goes away.
Then find out who in the household keeps loading these things and smack 'em good.