Hi
try out these links, the below link has a similiar problem and suggests of installing a hotfix from symantec for BSOD
http://www.vistax64.com/general-discussion/217527-irql-bsod-blues.html
you can try given procedures in the below link for downloading patches/hotfixes
http://www.symantec.com/business/support/index?page=content&id=TECH103088&locale=en_US
I hope you have all your windows security patches and updates, uptodate
Please also let us know as Vishal_Kalyani had above suggested whether you have SEP RU6 or above installed, installing that surely will solve your problem as it has the required patches/hotfixes integrated