Unfortunately, and this is real, Avast has failed to develop on a right track your excellent product.
One of the main problems that still maintains, is that it tends to detect malware that cannot be eliminated, and may only show windows of endless warnings.
Maybe should not deflect from the main use of an antivirus, which is protect and eliminate viruses, and not focus on it with additional tools, which have little or nothing to do with security.
Truth be told, there is antivirus that have passed far to Avast, as an example, Quio 360 security...