Question: Virus or Other
I received a message that said flash player needed to be updated, when I looked at the screen it did not look safe to me so I did not do anything. Now I keep getting popups saying run Mac Keeper also that McAfee has expired (I never had McAfee). Now these messaged keep coming up. How can I check to see if I have as virus, adware, or malware?
Thanks for any assistance.
IMAC (RETINA 5K, 27-INCH, LATE 2015), macOS High Sierra (10.13.3)