Learn what a Trojan horse virus is, how it works and what types of Trojans exist. Find out how to protect your devices from Trojans and how to remove them if infected. Learn what are trojans, types of Trojan malware, detection methods, and how to remove Trojan viruses from your PC. A must-read for cybersecurity experts. Trojans are deceptive programs that trick users into executing them, opening the door for cybercriminals to steal data, spy, or launch attacks. This detailed 2025 guide explains how Trojans work and covers the 15 most common types including Backdoor Trojans, Banker Trojans, RATs, and Ransomware. Learn how to identify, prevent, and defend against each type with real-world examples and best practices. Trojans are a common type of malware, which, unlike viruses, can't spread on their own. This means they either have to be downloaded manually or another malware needs to download and install them. Trojans often use the same file names as real and legitimate apps. It's easy to accidentally download a trojan thinking that it's a legitimate app.