Problem on uninstalling symantec antivirus

Hello,
i am surendra, i have installed symantec antivirus incorrectly. so now it doesn't work properly. i wann remove from system. but it doesn't remove. i am suffer from it when i click right mouse in any icon.
i wann seek best solutio for remving this antivirus from my computer.
i don't want to fomate it now.
if anyone idea on have that please response me, quickly..