Under the virus scam, the hackers send a "Trojan" virus to the victim's computer, which can give them complete access to, and control of, its files.
While the user is not infected if he or she simply read the e-mail without opening the attachment, people are urged to delete such e-mails immediately.
It is also recommended that people check that their virus-protection is up to date.
In addition to these measures, people are being encouraged to double-check the validity of any charity which asks via e-mail for a Katrina donation.
Downloads and Drivers
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