CutePDF is great for creating PDF files from MS Office documents, or from complex web pages.
The usage is simple, just print and choose CutePDF as printer.
For the installation, one need to install 2 files, one for CutePDF, and one for PS2PDF converter. Both are available from the download page.
CutePDF can also be used for protecting original MS Word and Powerpoint files, since one can send PDF file instead of the original file.