Hello,
In your case, I would suggest you to follow the Symantec Knowledgebase Article:
File System Auto-Protect is malfunctioning
http://www.symantec.com/docs/TECH102962
Try these Steps as well.
1) Go to services.msc
2) Stop all the symantec services
3) Open task manager
4) Kill rtvscan.exe and smc.exe
5) Again, restart the service
6) If that does not fix, repairing from add/remove programs should fix the issue.