A computer virus is a type of malware that can infect a computer system without the user’s knowledge. Once a virus is installed on a computer, it can spread to other systems and can be difficult to remove.

There are a number of ways to protect your computer from viruses and to remove them if they do become infected. The most important step is to keep your computer’s antivirus software up to date. You should also be careful about where you download files from and what you open attachments in email messages from.

If your computer does become infected with …