If you ever need to view PPT file you don't need to worry about not having a license for a Microsoft office bundle, PowerPoint Viewer is all you need. it is a free software from Microsoft that allows you to preview and print PowerPoint slideshow created with PowerPoint 2010 or older versions.
It supports .ppt, .pot, and .pps files with support for password-protected Microsoft PowerPoint files, however, you can not edit or create a slideshow with it you can only view or print an existing slideshow.
PowerPoint Viewer is no longer supported by Microsoft, instead, you can use PowerPoint Online it displays some newer features that can not be viewed with PowerPoint Viewer (such as the Morph feature and animations added to PowerPoint after version 2010).
Login to PowerPoint Online using a Microsoft account (hotmail.com, outlook.com, live.com, msn.com) or an Office 365 work or school account, to view, create or edit slideshows in a web browser.
Although PowerPoint Viewer has been retired by Microsoft you can still download it right here at Downzen, just click the download button on this page for a direct and fast link.