First of all, you should not let hackers sabotage you after taking your data a hostage. How could you do that? Make sure you have extra copies of your business data and keep them in external hard drives or similar solutions. Also, you should install a reliable anti-spyware and keep it up to date. Finally, stay away from malicious emails that have been actively used for spreading ransomware. To spot the malicious email message, you should check the sender. If you don't know him/her, you should ignore the email message or, if you are still curious about it, contact the sender and ask about the email. Secondly, make sure you read the email body carefully and look for grammar/spelling mistakes. Finally, check the attachment before downloading it to your computer.