Default "The update is complete" Messag

Hello all... Thoroughly confused and a bit worried here. Long story short, some people had my phone for a few hours (they may or may not have been intoxicated), and when I was given it back I found my G2 in safe mode and unlocking it gave me a message saying "Update is complete." Which scared me that it might have updated since I'm rooted and don't want KitKat anyway. (It gave me a much much shorter battery life and longer charge times.) I checked and I still get the notification asking me to update and I am still on 4.2.2.... But what could have been updated that would have given me this message? I'm probably being worried over nothing but it'd be nice if anyone could help.

Edit: Misspelled message on title, sorry bout that
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