Could antivirus software be blocking an MSI installation, resulting in error 1603, and if so, how can I resolve this?

Yes, antivirus software can frequently interfere with MSI installations, leading to error 1603. It might incorrectly identify the installer as malicious. To resolve this, temporarily disable your antivirus software or add an exception for the installation file and the target installation directory. After the installation completes successfully, re-enable your antivirus software and remove the exception if it is no longer needed.