The error message is letter/punc/spacing copy, though I can't be too sure whether there were spaces around the colon, or not. The only plug-ins present are those from the initial installation.
The windows 'find' function only recognizes file or folder names. There is no reason for any of the text in the error message to show up there (and it does not), with the exception of the identified system dll.
I'm not too sure I want to re-install SP4 of NT4, because there were a considerable number of loose ends, biult-in, that would have to be cleaned up again. Its a matter of resources and time here.
Considering that I use Winamp infrequently, it doesn't seem worth the time it would take to carry this matter further. It is, after all, only an inconvenience. I note it for the possible benefit of other users and to attract known solutions for the knowledge base.