II looked at the SETTINGS, but I do not see how to activate the screen saver scan.

Look at your screensaver options/settings.

Right click desktop > properties > screensaver tab

I have been a avast home user for many months now and I could be wrong, but I believe the screen saver scan is a function only available to the Pro version.

Which version do you have?

Yup you are wrong ;D
http://www.avast.com/eng/av4_version_comp.html
section “user interface”

Eddy, I might well be wrong, but I can’t see anything there which says a scan can be run under the screen saver, just that it has an ‘Antivirus screen-saver’. Perhaps this is automatic?

I can’t see anywhere in the Simple user interface that you can select a screen saver scan. Or because I don’t use a screen saver ever, I can’t see the option?

David, it’s a Home version feature.
You must go to Windows Screen saver options and choose avast screen saver.
Then click on Properties and set the available ones :wink: