Avast is a well-known and popular antivirus software. It is constantly being sent in emails as a promotion or advertisement. It is unknown how Avast is being sent in emails, but it is possible that the software is being embedded in a malicious email or file. If you receive an email that includes a promotion or advertisement for Avast, do not open the email or download the file.

Instead, contact the sender and ask them to remove the promotion or advertisement from their email. If you have already opened the email or downloaded the file, remove Avast from your computer.