Our true incremental updates are based on iAVS technology and they are available for virus definition file update and for program upgrade. You can download and install updates by simple clicking on the iAVS icon, it can be checked and done automatically when you are On-line. The update files of size under 100 KB are available at least twice a week and within couple of hours in the case of emergency of new virus. They are automatically downloaded, installed and loaded to avast! without restart or logoff. Program upgrades are available to incorporate new features time to time, they are incremental too (about 300 KB). You will download a 60 days fully functional demo. You will obtain the free license key by E-mail after the registration. Download, install, try, register, update and relax!

There is a professional version - avast! Pro. It adds more features and costs some money. Comparison table is here...