Once the progress bar finishes, Avast will run an initial startup scan to check for existing threats. Key Features for Windows 8.1 Users
Avast Free Antivirus remains fully compatible with Windows 8.1. While older versions like (specifically 8.0.x) are technically available through third-party archives, they are no longer supported and do not receive modern security updates. For the best protection on Windows 8.1, it is highly recommended to download the latest version of Avast Free Antivirus directly from the official website. How to Download and Install Avast for Windows 8.1 avast antivirus 8.1 free download
Microsoft ended technical support and security updates for Windows 8.1 in early 2023. While Avast continues to provide antivirus protection for this OS, the operating system itself is more vulnerable to exploits than Windows 10 or 11. To ensure maximum security, users are encouraged to upgrade their OS when possible. support.avast.com Information on system requirements for Avast apps Once the progress bar finishes, Avast will run
Minimum 1.5 GB to 2 GB of free hard drive space. For the best protection on Windows 8
Blocks viruses, ransomware, and spyware before they can infect your system.
At least 256 MB (though 4 GB is recommended for optimal performance).
Locate the avast_free_antivirus_setup_online.exe in your downloads folder and double-click to start.