My students use Elements 13 in the editing lab, and we have been having multiple machines just stop playback while editing. Clicking on the play button, or the space-bar doesn't work. I have had to close the program and reopen it to make it work again. The first couple of times I thought it was just a computer "glitch", but it is now happening on different computers more often. We are using Intel i7-2600 CPU @ 3.40GHz 3.39GHz 8 GB Ram running Windows 7 Professional. Using PE 13.1. I don't remember this being an issue before we did the upgrade to 13.1.