Why do hackers still launch ransomware attacks, if people and companies make back-ups of their files and can restore the files without paying money to get their files back?

To prevent a WannaCry-style ransomware attack on your network, you can take the following steps:

1. Keep your operating system and software updated with the latest security patches.
2. Install reputable antivirus and antimalware software on all devices.
3. Enable a firewall and ensure it is configured correctly to block unauthorized access.
4. Educate employees about the risks of clicking on suspicious links or downloading attachments from unknown sources.
5. Regularly backup important data and store backups offline or in cloud storage.
6. Implement network segmentation to limit the spread of ransomware in case of an infection.
7. Disable unnecessary services and remote desktop protocols to reduce attack surfaces.
8. Monitor network traffic for any unusual or suspicious activity.
9. Consider using security solutions that can detect and prevent ransomware attacks.

10. Have an incident response plan in place to quickly respond to and contain any ransomware infections.

Implementing these preventive measures can help protect your network from WannaCry-style ransomware attacks.