The latest version of avast free doesn't need to be registered.
Interesting note.
How it is possible that after a FREE time antivirus (active) announces that the user is not protected (surveys today - one day after expiry date) - reports that is not protected (
red) and calls the product (FREE) I registered - yet, as I wrote earlier - all done. I got an e-mail with the license key (which is not where to insert).
And after checking (my) his computer there is clearly noted that it is
Avast Free Antivirus version 3.17.2291 (build 17.3.3443.0).