What is a computer virus?<br />A computer virus is a type of malware that can replicate itself on your computer and spread to other devices.<br />How do you know you're infected?<br />If the computer suddenly starts running more slowly, crashes a lot, or does things like running unusual programs without your permission.<br />The best way to avoid a virus is to keep your computer up to date, run an anti-virus software, and avoid malicious websites.