chrome book froze?

my chrome book screen froze for 45 minutes. it just started up again. is there anything i can do to stop this

Anonymous2016-09-23T19:42:27Z

Did you:

Press the upper right button with the light, for about 15 seconds? If the light goes off, press the same button again.

If that doesn't unfreeze your Chrome Book, try closing your Book for some minutes, and restart it.

And, be sure to email the Chrome Book Help people, describing your situation.