How to protect yourself against ransomware or any kind of virus/malware?
If you receive an email from an unknown source which says you have received an invoice or a receipt for a payment with a Word document attachment, DO NOT OPEN IT. Delete it immediately. The Word doc is probably containing a macro which will download the malware on your computer and execute it. Similarly, if you get a rar or zip file in attachment, do not open it. Rule of the thumb is if you receive an email from an unknown source with an attachment or a link to download something – DELETE IT. No matter how tempting or threatening it is. The mail may claim to be from your bank, tax authorities or FBI. Don’t open it. Just delete it.
There is no cure for ransomware. Prevention is the best option.