Just don't use 2 anti virus programs.
You should use 2 antivirus/malware programs if 1 of them isn't running all the time. A good combo is Avast (which runs all the time) and Malwarebytes Free which operates on demand. They don't conflict with one another that way.
Also, if you're web browsing on a Windows computer, never do it without your browser being sandboxed as you're just begging for trouble that way. You'll get burnt sooner or later. Failing that, install a *nix VM and use that for web browsing.