Avast is an antivirus and anti-spyware program that is fitted with a powerful malware detection engine. Four scanning modes are available: quick scan, full system scan, removable media scan, and select folder to scan. These various modes offer a wide range of scanning options, with the first one lasting only a few minutes and the last one being a lengthy, in-depth system scan. Avast is able to operate even when there is already an anti-malware program on your system, which makes it ideal as a form of backup protection. For your convenience, the software gives you the option to set up automatic updates on your computer.