BeingInBoulder Said:
"How to get rid of Search Barron virus?: 3+ hours with apple support tier 1 and 2 and no one seems to know how to get rid of the 'Search Barron' virus which among other things cause a search in Google to switch to Bing or Yahoo. Help!"
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Restore From a TMB:
You are using macOS 10.14. So, restore from a Time Machine Backup (TMB), prior to this occurrence.
Did you create a Time Machine Backup, prior to the upgrade? If not, take this as a learning experience, knowing to always backup your Mac prior to installing any update or any software, whatsoever.