What is Symantec Auto-Protect
Symantec is the company who makes Norton Anti-Virus &amp; also Symantec End-Point protection.
If you have another antivirus product on your Mac - Avast - then you should completely uninstall Norton &amp;/or Symantec [Symantec may have been installed as part of a corporate package, in which case you'd need to check with the relevant IT department].
Having two live-scanning* antivirus products on one machine is bad - they can fight each other.
This doesn't include such as Malwarebytes Free, which does not live-scan.