The formatting and paragraph marks in Word are only visible in certain views. They can be turned off, leaving the formatting and paragraphs in place, but not displaying the marks.
I don't know about other software packages, but in Word 2007, the 'Home' tab displays a back-to-front 'P'. Click that.
If you're using a different version of Word or indeed another package and can't find the paragraph character (back-to-front 'P'), press F1 and type into the search box "hide formatting" and that should give you the instructions you need.
That's how I did it anyway.