I’ve had this once yesterday and twice today, at 06:42:06 and 18:42:25. Do need to do anything? It’s called a Trojan but says it’s been deleted … unsure what to do ...
Same Artemis number both times?
What you do depends on what the file was that McAfee didn't like. "Artemis" is for something highly-suspect which could though still be quite innocent. The file's been put in quarantine but you can see it by opening Security Center and going to Navigation --> Quarantined and Trusted Items.
Info on what to do is in https://community.mcafee.com/docs/DOC-1265