Microsoft Office 2007 You've bought a Vista equipped PC or have just installed it, and now you need to obtain an Office 2007 package, but which one? There seems to be a confusing amount of options available, but Microsoft has carefully designed each Office edition to suit its own niche, be it the student on a budget or the professional user who simply must have certain ms office features in which to stay competitive in their market. To help in selecting the correct version, the simple table below gives you a quick comparison of the main microsoft office 2007 editions. Upgrade Versions An upgrade version is a cost effective way of installing certain Office 2007 editions by upgrading a previous version of any of the following : Microsoft Office XP suite, Microsoft Works 6.0–10; Microsoft Works suite 2000–2006 or later; or any 2000–2007 Microsoft Office program or suite.   * Ensure you buy Windows software from a reputable seller, and not suspect pirate software. Legal software has a "COA" -Certificate of Authenticity, a label that identifies genuine legal Microsoft® Windows® software.