Computer viruses are malicious software programs that can damage computers and spread without permission. Viruses are often transmitted by email attachments, downloaded files, removable drives, and through networks. They work by attaching themselves to other programs or files. To prevent virus infections, it is important to have up-to-date antivirus software installed and configured to run regularly, only open trusted email attachments, be careful when downloading files, and back up files frequently.

1. Computer Virus