Avast is a very popular, free antivirus program that is extremely fast and effective. It offers protection of our computer against viruses. The program is able to block any hacker who wants to get your data. It has a variety of functions, including camera protection, which protects the built-in camera on your device from spies. Avast scans the pages you view, downloads and sends messages so that no virus enters our computer. The program does not affect the performance of our system in any way.