Running Norton 360 here on Vista Ultimate 64Bit and have no issues what so ever.
People need to get it out of their head Norton slows your PC down, it doesn’t and it’s much better than other virus apps out there, it has a load of features others don’t which in my eyes makes it excellent value for money.
Check how much memory and CPU is being used up, oh yes it does slows your PC down.
What aspects of the Norton suite is being used there..? I understand it covers an AV, Firewall, email checking etc etc etc.. So from your screengrab is that the entire suite of security features running or just say the AV and Firewall..?

Best look into that thanks.