As I have discussed on my radio segments there is a fake Windows 10 upgrade email that will infect your computer with a version of Crypto malware that will infect your computer and encrypt your files.
The links below are from a Lifehacker article and a Cisco blog post discussing this.
The lessons to be learnt are:
- Be suspicious of emails especially ones that contain zip files
- Make sure you have a backup
- Your antivirus will probably not save you