57. Keep your firewall always on

A firewall is a software or a hardware device that checks information that is received from

the Internet or a network, and either blocks it or allows it to pass through to a computer. A firewall can help prevent hackers or malicious software from gaining access to your computer through a network or the Internet. A firewall can help stop your computer from sending malicious software to other computers. In windows use Windows Firewall with Advance Security tool to configure your firewall inbound and outbound rules. Look for any programs allowed to send or receive data Keep your firewall always on