I won't say the best, but the enough.
Thank you for pointing that out Tech. I should have been more careful in my wording. I meant to say that for me, thefault settings and the standard shield set on high are the best.
I think Standard Shield on High is overkilling. Normal (default) is the best balance on performance and protection.
I have seen this comment (or in the whereabouts) from a few avast forum members. Yes, it is true that it seems to be and overkill (although to be honest I am not certain how much of a difference it makes) but for me I choose security over performance. The reason is that I sometimes use the school computers over which I have no control. So when I save a word file on my USB, I have no idea what else can come with it. So that is why I set the scanner to high.
Cheers