yorolpal
Yup...that's the advice I gave him. He didn't even have an anti virus program loaded. Or a hard drive backup. He will now. He got it, apparently, from trying to download a game for his young son.
Downloads and emails are methods of delivery ((CryptoWall)).
Thanks to your thread, I decided to read up about this Ransomware - Just recently read that the criminals upgraded Cryptowall to version 3 (Jan,2015), nasty stuff! But if its caught in the most earliest stage, it can be removed easy enough, but once it gets in deep - encrypts files - that's bad news, AND it can also infect
Drop Box files.
Anyway, I'm sure your friend will get his computer up and running as new soon.