Trojans represent a wide spectrum of malware, so the level of danger varies. Some Trojans create “backdoors” to your computer that allow unauthorized access, while others can steal your data. But let’s clear one thing up: Trojans and viruses are not the same thing! Both are examples of malware — software or code designed to do harm — but otherwise, they are different threats. The idea of a “Trojan virus” is a misnomer.