Run the symhelp tool see what issue exists. Once identified, it will show you available solutions:
Symantec Help (SymHelp) Download
http://www.symantec.com/docs/TECH170752
Download the Symantec Help (SymHelp) diagnostic tool to detect Symantec product issues
http://www.symantec.com/docs/TECH170752
Troubleshooting computer issues with the Symantec Help support tool
http://www.symantec.com/docs/HOWTO80839