My Phone is automatically resetted .

[AC Question]

I have a LG L5|| dual. Version Jellybean 4.1.2 .I was watching videos in my phone when I realized that only 6%power is left.So I closed all the apps and then power off.done. The next morning a got up I got my phone charging. When it was done I power onned my device.It took a lot of time.It was showing that,android is upgrading.And then some of my games we're gone. And everything:the YouTube icon,Google plus,messenger,etc are looking like the oldest version. And I m getting an error that Unfortunately, Google play has stopped.