
Based on your security settings, you can run LiveUpdate manually by going into the Symantec client and clicking on the LiveUpdate link in the sidebar. By default, LiveUpdate runs automatically at scheduled intervals. To avoid seeing this message more than once on the client, on the pop-up notification window, click Don't remind me again until after the next update, and then click Close. Protection updates are the files that keep your Symantec Endpoint product up-to-date with the latest threat protection technology. This notification continues to pop up until the definitions are current (as defined by the SEPM policy). Note: When the out-of-date definition condition is triggered, you may see the notification message pop up multiple times on the SEP client.

The configured time should be no lower than the amount of time it takes all clients in the environment to receive updated definitions plus one day.

This issue can be resolved by ensuring that the virus definition policy used by affected clients provides enough time before warning about outdated definitions.
