In one of the forums I am involved in there is a discussion of strange and interesting error messages and the like that we come across in the IT Industry. Here are some of them that were posted.
Computer Randomly Plays Classical Music http://support.microsoft.com/default.aspx?scid=kb%3ben-us%3b261186
OFF2001: Office Assistant Makes Sudden Loud Noise – http://support.microsoft.com/?kbid=269916
Sometimes Barney Starts Playing Peekaboo on His Own – http://support.microsoft.com/kb/172653/en-us
MSB Solar: ErrMsg: Solar System Needs More Memory to Run – http://support.microsoft.com/?kbid=143366
Kitchen: Known Content Errors – http://support.microsoft.com/kb/q161129
Hair color of the "person" icon for a user group becomes gray if the group contains more than 500 users – http://support.microsoft.com/kb/281923/en-us
And this one, no longer in the Microsoft Knowledge Base:
Explorapedia Nature: Earth Rotates in Wrong Direction – http://web.archive.org/web/20030118194034/support.microsoft.com/?kbid=131109
Other onscreen messages include
What’s your favourite error message that just does not make sense?