Be careful opening suspicious emails. With the new online invoicing systems available, scammers are using this to send emails with bogus invoices attached. These invoices can contain any manner of malware, and when opened, have the ability to infect your computer. The results of which can be:
- Encrypting all your data (photos, documents, etc)
- Sending your keystrokes back to the virus creator (think banking login details)
- Creating popups advising your computer has multiple viruses and you should call a displayed number, where the scammer will try to obtain your credit card details
When in doubt, delete the email.