A computer virus is a software program that can destroy information or make it difficult to manage the contents of a computer disk. Computer viruses can affect hardware, software, and/or stored information. Some computer viruses are intentionally created; others are practical jokes.

Computer viruses are spread primarily through floppy disks and e-mail. Using an anti-virus program once a week to check for hidden viruses (for school computers, check with tech staff first.) can help immunize your PC against most viruses. In addition, you should take care when using floppy disks or e-mail.

Next: Protecting your PC.