Nine Things That Often Go Wrong in PowerPoint 2013
You've run out of memory.
Many people still use computers with only 1GB of internal memory. Although you can run PowerPoint with as little as 1GB of memory, it will run much better if you have at least 4GB of RAM. The additional memory helps your computer to not give up and crash from the overload of open applications. Memory is cheap! Why not make sure you have enough?
Type Task Manager and click the Task Manager button. Then click the Performance tab and click Memory to view the memory information.