My iMac with OS 12.6 got infected and frequently displays flags in the upper right of the screen with various messages pertaining to viruses on my computer. Some of the messages reference “my Norton” or “McAfee” antivirus. Other messages promote renewal of those programs. I NEVER HAD ANTIVIRUS SOFTWARE ON MY COMPUTER UNTIL I LOADED BITDEFENDER YESTERDAY!
When I downloaded Bitdefender yesterday I expected it to scan my computer, identify the virus and remove it, but, it did not. What should I do?