Protect yourself from viruses by installing anti-virus software and updating it regularly. You can download anti-virus software from the Web sites of software companies, or buy it in retail stores; the best recognize old and new viruses and update automatically.

Prevent unauthorized access to your computer through firewall software or hardware, especially if you are a high-speed user. A properly configured firewall makes it tougher for hackers to locate your computer. Firewalls are also designed to prevent hackers from getting into your programs and files. Some recently released operating system software and some hardware devices come with a built-in firewall. Some firewalls block outgoing information as well as incoming files. That stops hackers from planting programs called spyware-that cause your computer to send out your personal information without your approval.
Don’t open a file attached to an e-mail unless you are expecting it or know what it contains. If you send an attachment, type a message explaining what it is. Never forward any e-mail warning about a new virus. It may be a hoax and could be used to spread a virus.
When something bad happens-you think you’ve been hacked or infected by a virus-
e-mail a report of the incident to your Internet provider and the hacker’s Internet provider, if you can tell what it is, as well as your software vendor.