I encountered a false positive where a pure text file made up of personal log entries was flagged by antivirus as malicious, and it started fighting me on tryin

I encountered a false positive where a pure text file made up of personal log entries was flagged by antivirus as malicious, and it started fighting me on trying to restore the file from a backup as well. Fortunately, I was eventually able to recover it, although I've forgotten how. Probably my most memorable lesson in unexpected failure modes for complex, automated software.