Just installed 18.04. It's asking me about this every time I log on. It has something to do with security and passwords, but I can't find a definition. I can't decide what to do with it if I don't know what it is.
System 76 offers you the ability to disable the Intel Management Engine, a computer-within-your-computer. However, if you change your OS to a different release or version, IME may return.
Some folks don't like IME for security reasons. Suggest you do your own research on the benefits and downsides of IME before you make a decision.
Based on comments, I searched for "system76 me disable switch" and found that it's System76's solution to a security problem with Intel's management engine.
One discussion seems to indicate that it's not actually disabled.
I don't know if that's the whole story, but I've identified the issue to research.