Hi, does the problem still persists if you manually started Symantec from the Start menu?
Open the MS Services and look for the following:
- Symantec Endpoint Protection
- Symantec Management Client
Both should be started among other Symantec components. Except for the Symantec Network Access Control.
If the repair fails. Try getting a new install package, run that and chose either to repair or uninstall and then install the new package.