A pop-up window at Google startup.
When Google starts, a pop-up window pops up saying: The application "23.5111.57" was not opened because it contains malware. No harm has been done to your Mac. What does it mean and how to get rid of it?
What did Google Chrome Support or their Community say about the message...?
Have you tried clearing out and deleting your Google Chrome Browser History...?
EtreCheckPro is an excellent tool for finding and sorting out problems.
Download and run the free version of EtreCheckPro, from > https://etrecheck.com/en/index.html
Then post back here with your Report, as per > How to use the Add Text Feature When Post… - Apple Community
