If anyone is running this, surprise surprise, symantec has issues... *rolls eyes* SEPM is reporting that it's definition files are outdated and anything you do to update doesn't seem to take? Join the club *grumbles*

They're patching it. Some patches are already available. Some are still being worked on. Make sure you check your software version before applying patches.

Symantec forum for updates

Symantec KB Linky