After upgrading the Symantec Endpoint Protection Manager (SEPM), users are experiencing unexpected restart requests at the SEP clients. But only the SEPM was upgraded, and there were no changes to any upgrade packages assigned to client groups in the SEPM.
"The Symantec Endpoint Protection installation requires this computer to restart" pop-up at clients.
Part of the cause may be an existing upgrade package assigned to client group in the SEPM, even though that package is the same version already installed on the client and should not be triggering an upgrade or restart request.
This issue has been fixed in version 14.2 RU1 MP1.
Download the latest version of Symantec software: https://support.symantec.com/us/en/article.tech103088.html
You can work around / prevent this unexpected restart request by: