Logged in, and there's some notification asking me to backup the key because it is encrypting my file system. I didn't ask it to do that, and I wasn't even logged in as admin before the reboot.

How to Encrypt any File, Folder, or Drive on Your System Trust us, it’s safer this way. Photograph: Peter Dazeley/Getty Images ...

After targeting consumer and then business computers, ransomware authors are now going after Web servers.