For this, you can use a free online scanner VirusTotal. To be fair false-positive detection happens basically to every antivirus on the market, it’s not just Avast.Īnyway, we strongly recommend scanning the file/webpage also through some other virus engines to make sure it’s really clean. In the past, Avast was blocking some of the most popular software (Steam for example) for a short period of time. This is a perfect fix when Avast is blocking one of your favorite programs, but you still want to run/allow it. If such false-positive detection prevails after the virus definitions update, you may want to exclude the detected software or website from the Avast scan. These wrong detections are called false positives. In very rare cases, Avast may detect and block some programs or website pages as a virus, although you know for sure it’s safe.