Internet connection problem

Could you please give simple instructions on what I need to do to get the pc checked by an expert and where I can find details of the other AV to use. I am not particularly computer savvy when it comes to matters like this as you can probably tell. Thank you

I appreciate your help with this matter but I do not have time to just sit and sort this out and so am trying to fit it in amongst everything else. Please bear with me and I will respond whenever I can, just so that you know I am not ignoring you. Thank you again.