How do i decode a coupon from the web?

I'm trying to print out something my sister sent me for a discount shopping at one of my favorite stores. I downloaded the attachment and it opened up with word, but coded and it keeps saying find the correct encoding to make it readable. should i be opening it with Word 2007 or something else? I've tried the utf-8 and all the other ones and it's still unreadable. By the way, i'm using Windows Vista Premium.