If you use Windows XP or below you can go to Start > Control Panel > Add or Remove Programs. In the Currently installed programs box, click on the Microsoft Office PowerPoint Viewer program and then click Remove.
If you have Windows Vista or above you need to go to Start > Control Panel > Programs > Programs and Features. Select the Microsoft Office PowerPoint Viewer application and click on Uninstall.
After that, go to the official web page and download and install the latest version of the software. It is developed to open all PowerPoint 2010, 2007, 2003, 2002, 2000 and 97 files. Once you install it, right-click on the file you want to view, click Open with and select the software from the list