Update your Operating System regularly.
Install and regularly update anti-virus software.
Do NOT download email attachments from unknown sources.
Be cautious when entering your credit card number and other personal information online. Always ensure the website you enter your credit card information in is a secure site indicted by https.
Install a router to put your devices behind a firewall and to keep your IP addresses private.
Make a strong password for your email and router. Change the administrative password and user name for your router and any devices that can be logged into remotely such as web-cameras, thermostats, access points, security alarms, etc.
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