Windows Users:
Watch out for this nasty new piece of malware:
https://en.wikipedia.org/wiki/CryptoLocker
https://www.computerworld.com/s/article/9243537/Cryptolocker_How_to_avoid_getting_infected_and_what_to_do_if_you_are_?taxonomyId=154
http://www.snopes.com/computer/virus/cryptolocker.asp
Basically, it encrypts your files and then asks for a ransom to recover your system.
This is a bad one, just be VERY careful opening ANY email attachment from a corporation that looks otherwise legitimate.
(i'm safe on Linux and Mac...at least...so far...)