First, I’m an Avast user and not an Avast Team member.
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Cancelling automatic renewal of the Avast subscription
- See https://support.avast.com/article/account-unsubscribe/#pc or https://support.avast.com/article/35 ,use the primary link for advice.
- Also see https://support.avast.com/article/Unsubscribe-FAQ/#pc