: Go to the Avast One Free Antivirus for Windows page on CNET Download .
: Locate the downloaded setup file and right-click it, then select Run as administrator to ensure full system access.
: Wait for the green installation bar to complete. If the window disappears, it is likely continuing in the background.
Right-click the downloaded setup file avast_free_antivirus_setup_online.exe and select Run as administrator from the context menu.
Downloading Avast from CNET Download is a straightforward process that provides a free, essential layer of security for your PC or Mac.
: Click Yes if Windows prompts for permission to make changes to your device.