buffer enacs M-x set-buffer-file-coding-system [the M-x is emacs-speak for the meta/alt key, or alternatively ESC x]. (Or if running graphically under X11, select from the menus Options->Mule->Set Coding Systems->For Saving This Buffer.) Then at the prompt enter one of these two:
undecided-dos undecided-unix
Okay, so there are several solutions but...
I am setting my system up so that my wife, who has no interest in such thinks, can simply get used to using a set of programs and use them whether the computer is in windows or linux. I personally think that needs to be the focus of all attempts to win over windows users.
So, is there a good text editor which runs in windows which will correctly detect the line breaks. Then she can use that and be none the wiser ;)
Duncan