Suspicious warning about a Kernel Extension
Without knowing anything about your machine (i.e. what OS are you on?  possibly not El Capitan (OS 10.11.x), but that's an educated guess...) it is difficult to say, BUT Apple would update your computer through the Apple Store, and it would not just dump a Kernel Extension like that.  About your Kext there, I would not have a clue, but a quick google does not come up with exctitingly good news.  I trust you have a backup of your data.