Read more detailed steps and other options including screenshots below. Add it as exception by going to Avast user interface » Settings » General » Exclusions.Make sure the blocked file or webpage is not malicous by testing it at.Usually the false-positive detection lasts only a few hours, but can be very annoying. Unfortunately this often happens with popular games and services like League of Legends (LoL), Steam, GoG Galaxy, Minecraft, uTorrent, BitTorrent, Windows Update, Google, Java, Chrome and other launchers which are being often updated. Therefore, Avast can’t properly tell if the program is safe or not, and will try to protect you.Īlso, Avast detects so-called ‘ Potentially Unwanted Programs‘, which are actually wanted in some cases, and so-called ‘ False-Positives‘, which means the program is safe but Avast’s detection is wrong. Usually, it’s because of the low application occurrence within the Avast community. Sometimes Avast Antivirus may be blocking you from running a program or accessing a web page, which you know is totally safe. Why Is Avast Blocking Dr Cleaner For My Mac Computer.