You don't necessarily need Microsoft Excel to work with an .xlsx file Reviewed by Ryan Perian This article explains what XLSX files are, how to open them, and which programs are able to convert ...

All,We are still on Office 2000 with Outlook 2003. I installed the office 2007 compatability pack on a few computers to convert from the DOCX and XLSX to 2000 format to read, and this works on all ...