Unfortunately, Windows has been known to not play well with other OSes, and thus, there are no "dos2unix" or "unix2dos" commands built-in. :-( I haven't recently checked if there are any open-source add-ins or commands to do this.

Some text editor programs allow you to change the file attributes. I happen to use the open-source Crimson Editor (now called Emerald Editor). In Crimson Editor, the menu comand "Document | File Format" will give you a choice between DOS format (CR/LF), Unix format (LF only), or Mac format (CR only).

And then there's Cygwin. :-)