StopZilla-avoid computer viruses

How to remove and avoid computer viruses A computer virus is malicious software (also known as "malware") that can copy itself and infect other software or files on your computer. If you suspect your computer has been infected, the Microsoft Windows website provides step-by-step instructions for removing viruses and other malware. Fortunately, if you update your computer and use free antivirus software such as Microsoft Security Essentials, you can help permanently remove unwanted software and prevent installation in the first place.