This is what I see in the logs
4Symantec Endpoint Protection has detected that there are pending system changes that require a reboot. Please reboot the system and rerun the installation.
Follow this document
Error: "...pending system changes that require a reboot" when installing Endpoint Protection
https://support.symantec.com/en_US/article.TECH103109.html
https://www-secure.symantec.com/connect/articles/pending-file-rename-operations