Nowadays the whole world (or almost all) has an MSN account and many of them have forgotten their password to access it. To solve this memory problem you need MSN Password.
MSN Password is a simple tool that lets you recover these MSN passwords that you've forgotten or lost, so logically you need to run it in the same PC where you run your MSN acount.
For obvious security reasons MSN Password doesn't show the whole password, just partially (only a few letters) to help you remember it, indicate what it is, or jog your memory.