Where the antivirus scans the system before even loading the OS.

You can get these viruses due to the following reasons. When you visit different sites just to browse or download files like movies, games, software, etc, which everyone nowadays does, and if you visit non-trusted sites.

How do computers infect from virus? How do computers get infected?īefore Talking about Avast Boot Scan, let’s talk about how your computers get infected by viruses. So Antivirus companies came with a new technology called Boot Scan. Because they have infected the computer so much that a simple antivirus is unable to remove them. Some viruses like a trojan horse, are not able to remove. Sometimes viruses can infect your computers that a normal Antivirus can not detect or remove that is where Avast Boot Scan comes in handy.