I don’t think he had any other protection in the past, but I went to Remove Programs and nothing was there.

Dad is using XP.

He said a screen came up saying Avast needed an update and he only clicked OK.
He said no option to install Google Chrome was offered (and no check box). My guess is he is mistaken. He claims he hit OK and hours later the update completed. His memory is not what it was so what he claims may not be 100% accurate.