I am seeing Duplicate Object Blocked for ccsvchst.exe in my log
I have over the years see hundreds of these iin other peoples logs.
Why has Symantec not recitfied this problem 
My latest log record
Category: Norton Product Tamper Protection Date & Time,Risk,Activity,Status,Recommended Action,Date,Actor,Actor PID,Target,Target PID,Action,Reaction 19/08/2011 12:28 PM,Medium,Unauthorized access blocked (Duplicate Object),Blocked,No Action Required,"Friday, 19 August 2011 12:28 PM",C:\WINDOWS\SYSTEM32\SERVICES.EXE,560,\Device\HarddiskVolume5\Norton AntiVirus\Engine\18.6.0.29\ccsvchst.exe,1108,Duplicate Object,Unauthorized access blocked
I have seen the link posted by
That describes why the situation exists.
but not why norton products would still continue to behave this way if they know about it.
Really they are required to work together not bump heads all the time.