Artful Dodger: I haven't tried Avast. What I found annoying about Avira was the advertisement window that popped up on every update. I like my AVG, but I am only really happy with it since I have more than one CPU core.
(esconder) Se apenas lê regularmente alguns fóruns, pode adicioná-los à sua lista de fóruns favoritos indo à página desse Fórum e clicando no link "Adicionar à minha lista de fóruns favoritos". (pauloaguia) (mostrar todas as dicas)