Avast is popular antivirus software available for Windows, macOS, iOS, and Android. It is available in free and paid versions, both of which can effectively protect your data from unauthorized access. It can detect and remove all malware and other threats, making it one of the most recommended third-party antivirus solutions.
When using Avast to protect your computer from viruses, you should regularly check for new virus definitions. This is a database of virus types that antivirus software uses to detect threats to your system. Sometimes an error occurs when you try to download this database.