+ I keep getting PowerPoint .pps files from friends in my in box. Until now, without PowerPoint installed, I couldn’t view them. Microsoft has a free PowerPoint Viewer, which is supposed to only work for 95, 98, or 2000 operating system, or Microsoft Windows NT Workstation operating system 3.51 (with Service Pack 5.x or later) or 4.0, or Microsoft Windows ME users. I installed it on XP SP1 and it works fine.