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Why do I need a firewall?

A firewall protects you against hackers and malicious software. Hackers are constantly looking for opportunities to access computers to steal passwords, financial and personal information, and files. Hostile software writers have increasingly found ways to establish hazardous attacks through Trojan horses and worms. These types of malware can take control of your computer. There are numerous online companies that provide firewalls as well as antivirus and online software protection.