Here are steps you can take to prevent ransomware attacks from encrypting your files:

1. Backup regularly – copying your data to secure offsite and disconnected back-up systems will help protect you in case of attack.
2. Restrict user access – ensure that only trusted individuals have access to critical systems, and that permissions are regularly reviewed and updated.
3. Install and update anti-virus software – anti-virus programs are designed to detect malicious software and alert you if it's detected on your computer.
4. Monitor system activity – use software to detect any unauthorised changes to your files and devices, as well as any suspicious user activity.
5. Run regular server updates – applying security patches as quickly as possible is key to preventing ransomware hackers from gaining access.
6. Train staff – training your staff on the risks of ransomware and how to spot suspicious activity is essential in protecting your business.