Be Very Careful and Skeptical of Email Attachments, Even From "People" You Know

Most of the malware and ransomware that comes through the internet and onto our systems is thanks to email attachments. If you see an "invoice" with an artificially rushed, demanding tone from a powerful figure (such as your work boss) and they've attached a "PDF", be very skeptical and do not open it. The same goes for links, since they can take you to a very shady site. Make sure to update your computer with security patches to prevent infection from background exploit kits across the web.