Did you know that Office 2007 (and newer) files are actually ZIP archives? Say you want to get some of the pictures out of a PowerPoint presentation. How do you do that? Simply rename the file “presentation.pptx” to “presentation.zip” and double click it. Windows Explorer will open a window showing everything within the presentation. Click File > Extract and you will get a another new window showing you those files & folders, including those pictures you wanted to save.