It restarts your computer and looks for any suspicious behavior from any applications. In such scenarios, the Boot-time scan can solve the problem for you. You can have a malicious file that also operates out of the operating system. It makes the program more effective in exchange for a noticeable performance lag in the system. Thus, the process allows Avast to track even the minute viruses present in the system. However, it checks for an infection in every file available on your system. It might take a couple of hours on a slow machine. The Full-virus scan digs deep into the system to look for viruses. Here, you can find functions like Full-virus Scan and Boot-time Scan. Apart from the Smart Scan option in the main menu, you can access the detail scan options in the Protection tab. Avast offers a variety of advanced scanning options.
