What Is A Computer Virus?

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