Computer virus is a program that can replicate itself in your computer system and use a lot of system memory. This can cause your system to crashes. Other than that, it can also delete the system files, use your email to send spam and reformatting your hard disk. Therefore, it is important to have a protection against this type of threat.

When your system is infected by viruses, it will use your email client to send messages to all of your email contacts. The emails will contain virus in the attachment and this will make it to spread faster.

There are several ways how you can detect and stop it from spreading via email. First of all, you need to create a new contact and type '!00' as the name and 'virus/worm alert' as the email address. The!00 name will be on top of your contact list because it starts with the exclamation mark.

This way, every time it tries to send emails to all of your contacts, it will send it to the first contact name on your contact list and that is the '!00' name. The email will bounce back because the email address does not exist and you'll be notified. This will act as an alert system for email viruses and you can scan your system for it.

Another way how you can prevent your system from getting infected by this type of threat is by not opening any unknown emails that you have received. If you don't know the email sender or where the email comes from, delete it completely without opening it.

A good anti-virus protection will have an email scanner and it will scan every email that you receive to make sure that you're protected. One of the anti-viruses that has email scanner is Avast! Antivirus.