This free antiviral program provides all that you need to protect your computer, including a tool for scanning your hard drive and a real-time shield (the AVG Resident Shield) to prevent infections. This freeware can search for new virus definitions every day or at the rate of your choice. In case of emergency, AVG Anti-Virus Free Edition creates a rescue disk and lets you scan your computer in MS-DOS mode. The interface is easy to use and the software will not slow your system down while scanning it in search of viruses, according to its editor.