It's important for everyone to read as much as they can about ransomware. Most of the ransomware attacks show up as a result of the user, at some point, clicking on a bad link in email, or visiting a website that holds malicious data, and not having updated software on the device. Windows-based computers are the most targeted, but Apple computers can be vulnerable, too.
The most recently publicized attack, "WannaCry," hit hundreds of thousands of computers globally. It's still under investigation, but the basic reason systems were infected was the failure to update their operating system and all security updates or "patches." It did not affect those with updated operating systems and security patches.
This, by itself, should be a good and valuable warning for everyone to be sure to keep all their software up-to-date.
Thank you for this thread, @LilacTree. It's so critical to keep talking about these dangerous, criminal scams to be sure everyone is aware and safe. I'm sorry this has been happening to you and other posters.
Few things reveal your intellect and your generosity of spirit—the parallel powers of your heart and mind—better than how you give feedback.~Maria Popova