Here are a few programs to use that will convert a document to a PDF or change a PDF to a file you can edit.
The one I have personally tested was FREE PDF to Word Converter (http://www.hellopdf.com/download.php).
- Select a PDF on the left.
- Where to save it on the right (as a Word file).
- Click Convert.
- You're done and then Word file opens automatically.
Hope this helps!