If you’re one of the over 2 million users worldwide that has been infected by CCleaner, you need to remove it from your computer immediately.

Your computer is a treasure chest of important files and sensitive data. If a virus infects your computer, your personal information could end up in the wrong hands. At the very least, your photos, downloaded music, and movies, even saved emails could be lost forever.

Virus-laden email attachments have been around for decades, but they’re certainly not old news. In fact, millions of computer users around the world use desktop email software instead of browser-based tools such as Gmail. As a result, you’re exposing your operating system to downloads every time you open an email rather than merely viewing it online.

Are you looking for the right antivirus but have no idea what any of the terminology or hacker lingo means? How can you decide whether you need heuristic detection or real-time protection, or protection against phishing or malware if you don’t know the differences between them?

Let our cybersecurity experts define all the important terminology so that they make a bit more sense, whether you’re an amateur looking for a basic breakdown or a professional needing a quick reference list.