Open PowerPoint, click the Insert tab–>Photo Album.
Click File/Disk… and browse for your photos. Change the Picture layout and frame shape if preferred.
Click Create and a PowerPoint presentation is automatically generated.
Tip: Make the the PowerPoint loop continuously without interruption so you can show your pictures at a reception area gathering. Click the Transitions tab and switch the default “On Mouse Click” to advance slide to a timing of your choice. Say 10 seconds or so. After you finish the timings per slide, head on over to the Slide Show tab and click “Set Up Slide Show”. From the dialog box, check “Loop continuously until Esc”.
Don’t forget to add fun slide transitions as well.