I guess this was a kown issue ,
I would suggest you to upgrade to Ru1.
I have the same issue in my machine
Hello,
It's a Known Issue of SEP 12.1
http://www.symantec.com/docs/TECH163124
MIGRATE TO THE SEP RU1???? HOW???
To migrate from SEP 12.1 to SEP 12.1 RU1 follow the article given below:
http://www.symantec.com/docs/TECH174545
In your case, since you are carrying the SEP 12.1, you would have to Download the SEP 12.1 RU1 from https://fileconnect.symantec.com/
Here are the Overview steps which you need to follow (provided in the Article above) http://www.symantec.com/docs/TECH174545
Hope that helps!!