You are sent an email by a colleague with a link from your own company’s website on it. Curious, you click to see whatever it is your colleague is trying to show you, only the page takes too long to load, so you close it and forget about it. It is a seemingly innocuous part of any office day but, inadvertently, you have triggered a mass security threat.

The email was not from your colleague at all - but the hackers who really sent it made sure it looked as if it was. The link to the company website was not as it seems either - it was a virus with the power to access all the information on your computer, including your passwords, emails and sensitive documents.