Ransomware is a type of malicious software that encrypts files on a victim’s computer and demands payment in exchange for the decryption key. To defend against ransomware, it is important to have a multi-layered defense strategy that includes the following measures:

1. Backup your data: The most effective defense against ransomware is to regularly back up your data to an external hard drive, cloud storage or another secure location. This way, if your computer is infected with ransomware, you can restore your files without having to pay the ransom.
2. Keep software up-to-date: Ransomware often exploits vulnerabilities in software to infect a computer. Regularly updating your operating system, web browsers, and other software can help to patch these vulnerabilities.
3. Use anti-virus software: Install and regularly update anti-virus software to protect against malware, including ransomware.
4. Use strong passwords: Use strong passwords and enable two-factor authentication on all accounts to prevent unauthorized access.
5. Be cautious with email and attachments: Be wary of suspicious emails and attachments, and avoid clicking on links or opening attachments from unknown or suspicious sources.
6. Use a firewall: A firewall can help to block unauthorized access to your computer and protect against ransomware.
7. Educate yourself: Educate yourself on the latest ransomware threats and best practices for cybersecurity. Stay up-to-date on new threats and trends in the cybersecurity landscape to better protect yourself and your data.

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Text generated by ChatGPT, developed by OpenAI (https://openai.com/) accessed on Feb 19, 2023.