Plug the drive into the target PC. Right-click the file and select Run as Administrator .
If you need to install Avast Free Antivirus on a computer that has a limited or non-existent internet connection, the standard online installer won't work. You need the standalone offline installer. download avast free antivirus offline
While most users prefer the small, quick-start online stub, the offline version is superior in several specific scenarios: Plug the drive into the target PC
Download the file once to a USB drive and install it on ten different PCs. quick-start online stub