Download Clario and start your free 7-day trial today. AV test has proven Clario’s detection rate to be close to 100%, so you can rely on its real-time anti-malware protection to keep your device safe. One of the best sources to check is the AV test. Pro tip: While choosing an antivirus, always compare the virus detection rate different apps provide. But knowing the most destructive and tricky computer viruses in history can help you avoid them.

Even when you’re armored with antivirus software, there is still a chance your system and personal data may be corrupted. While you’re reading this, 970 million pieces of malware are circulating the web, ready to pounce. The internet is filled with various types of viruses.

From viruses disguised as love letters, to worm battles, here’s everything you need to know about the world’s most famous computer viruses, where and how they can be caught, and how to avoid them.