Paul,

If you read my previous reply, im only using BD. And Zemana, which you might even forget is running in the background.
Lightweight on resources,but provides awesome real time protection. Zemana's website suggests users have their own AV and firewall since it is just like an add-on.

I was just testing running multiple AVs simultaneously, and was surprised that they worked well together, not using Norton anymore on my primary PC

LOL :-D