PDF Creator is a useful freeware tools that is designed to export your office document into PDF document. The software will export your document from print menu on your document software (Microsoft Office, StarOffice, or Wordpad).
Unlike OpenOffice, Microsoft Office doesn't come with capability to export their document to PDF. You must install addon file to make Microsoft Office (Word, Excel, or Powerpoint) can export your work into PDF. But remember, you can't export from "Save" file option but "Print" option. On print option choose print using your addon.