There is a somewhat new Virus or Ransomware out there called Cryptolocker
It is transmitted usually through Email as a pdf attachment. Once you open the attachment it encrypts all of your files and then gives you 3 days to send $300 to a private address to unlock your files. If you do not do so within 3 days, you files are permanently lost.
- Do not open up any email or click on any attachment that you are unfamiliar with.
- Be certain that you have good MULTIPLE backups of your files. This way if the 1st backup is compromised you still have another from a couple of days before.
- In addition, it is a good idea to belong to online backup services such as Carbonite.