A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
That's a problem, all right, but not the one we're trying to solve here, unfortunately.
Lenovo has a pretty good support forum; you might want to ask there, but first look at your power settings; there you can choose what happens when you close the lid on the laptop. It's possible that it's set to shut the PC down rather than cause it to sleep.
Or if it's sleeping the computer and the battery gets too low while the thing's snoozing, it might just shut down on its own. In that case, try having it hibernate rather than sleep.