I found this tool a month or so ago and have been using it all the time to create PDF files of all kinds of things, including preparing a postcard for a print shop and posters for a plotter.
It is free and legal to download. It installs easily and doesn’t need admin privileges. It installs itself as a printer so you can use it from any Windows application by using the print command and selecting PDFCreator as the printer and tell it where to save the PDF file. You will have some options to tweak if you wish but it works great with all of the defaults.
Download this tool from http://sourceforge.net/projects/pdfcreator/