Most of the Outlook email client users have encountered an Outlook protection add-in error associated with the Symantec software. Symantec is one of the security application created to provide protection for Windows computers. This security application provides full protection for the Outlook application and email service providers. Generally, Outlook will not create an error or issue. But, there is a chance for the Outlook application to freeze or crash if it configured with the Symantec application.
There is one more solution available to fix the Outlook protection add-in error caused due to the Symantec antivirus software. Most users have reported this issue when they have migrated from Symantec to some other antivirus application. So, this means that Symantec might not have been removed from the computer completely. The alternative solution to be followed to fix this issue is briefed below.