"You Are At Risk"

Hi all,

So recently I encountered this error with Norton that said my system was at risk, and running a quick scan did nothing, despite no threats being found. I looked around here and found advice to run LiveUpdate, but I got an error and "norton web protection definitions (critical)" failed to update. This all occurred after a restart, after my laptop froze and I had to manually turn it off by hitting the power button. So I looked around a little more and found something about disabling fast startup. I did so, restarted, and now Norton is no longer red and will update correctly. I've done a quick scan and it still seems fine, but for my own peace of mind, did I miss any key steps here, and is it likely that I could have some kind of malware, or was it a harmless error caused by fast startup that is now fixed?

Thanks!