@MartinZ
@DavidR
Thanks for all the help and explanations, but for now Avast is working like it should. If those messages start appearing again or I have any other problems, I will send a PM to MartinZ asking him to email me... so I can send him the folder.
I am not the most tech-savvy individual, so those things always end up being a headache for me... and it dosn't help that I am from Brazil so I must translate half the advice