First of all, you should have this software, which is OFFICE, and then you can right-click on the desktop-New-New Microsoft PowerPoint presentation.

Open it after the new one. If you need more than one slide, you can click Insert-New Slide in the menu bar.

If you want to put a picture in your PPT, you can insert it into the file-Picture-From and find out where your picture is stored.

All right, that's all.