When you submit application files to the Avast Threat Lab, a group of analysts review the software for malicious or unwanted activity. Applications that are both. It protects you in real-time by analyzing unknown files before they get to you. So relax: With Avast, you're running the most trusted antivirus out there. For standard installations, use the regular (Administration Console) installation file. For non-standard installations (e.g. if you need to install the administration.