On 30 Jul 2016, Mort wrote in
alt.windows7.general:

Thanks ever so much for your very helpful post. I was not aware
that there is an Avast forum. I shall attend to this as soon as I
finish cooking and eating my dinner.

I wonder why my larger laptop has this problem, while my smaller
travel laptop does not. As a computer geek at a shop told me,
"These electronics are all crazy."

You're welcome. I let the update happen on two of computers in my
house, and there was no problem with either. After I saw reports like
yours I decided to hold off on the others until the issue seemed to be
dealt with. I should know by now to let other people be the guinea
pigs!

Despite the "all clear" reports, I'm still going to wait a few days to
make sure.