It's clearly seen that nine out of ten most encountered threats are trojan viruses.
The first trojan in the list, Trojan.Clicker.CM, displays commercial ads, which "eat" the bandwidth and, as a consequence, slow down the PC.
It should be pretty evident that methods to remove trojan viruses should quickly adapt to the reality, since trojans lead the malware army.
So before learning how to remove trojan virus, it is important to know what this type of malware is in essence.
In short, as the term suggests, a trojan pretends to look and act like it's a legit Windows application. However, its malicious code is programmed to execute operations that no PC owner would want on his computer.
- Trojans are capable of stealing important information (passwords, credit card numbers, etc.) Then the sensitive data is transmitted over the Web to virus creators, who then are able to take control over infected computers.
- A considerable slow-down in system performance is one of the consequences of trojan virus infection.
- A user may be distracted by unexpected pop-ups with ads (mostly with casino, poker, adult content).
- Trojan viruses attempt to become parts of the infected system by interacting with Windows processes and injecting malicious code into legitimate files executed by the operating system (Winlogon is an example of such injection when a trojan virus is fully loaded after the user enters login details).
