Hi Colleen,
Best antivirus protection depends on whether you're after a free one or a paid one.
For paid ones, I would go with Mcafee or Norton (latest releases of course).
Norton can be resource heavy and my personal choice is Mcafee.
As for the free ones, yep AVAST is pretty good.
If I had to pick, I would spend the few pounds and go with Mcafee solution as antivirus software is something rather important.
There is a reason corporates / colleges etc use Mcafee and that is because it is one of the best
