How are viruses harmful? How can you prevent them?

Q. How are viruses harmful? How can you prevent them?

Answer =

Viruses can spread from computer to computer, and they can replicate themselves.

• It is able to replicate.
• It requires a host program as a carrier.
• It is activated by external action.
• Its replication ability is limited to the (virtual) system.

We can prevent virus by:-

• Never use a "foreign" disk or CD without scanning it for viruses.
• Always scan files downloaded from the internet or other sources.
• Never boot your PC from a floppy unless you are certain that it is virus free.
• Write protect your disks.
• Use licensed software.
• Password protect your PC to prevent unattended modification.
• Make regular backups.
• Install and use antivirus software.
• Keep antivirus software up to date.