Most commonly, when any thing goes wrong with the system the first to be blamed are viruses' .But they are not always the reason. Even the users are responsible for the virus attacks. Viruses are many in form. Most common are worms, viruses and Trojans. The Trojans are not actually viruses but they are still considered so. Trojans have derived their names from the war in Greek mythology. Where in treachery was done to win that certain war. "Trojan" this term is now more prevalent in the tech-world.
Trojans are very rampant and are equivalently hazardous. These work in the similar manner as the Trojan in the war. They come packaged with some seemingly harmless download or a software patch. They may come along with un-scanned attachments on emails. They are very hazardous once they run on your machines. Once they are installed, these affect all files and corrupt the data. These are known to crash in your PC's information and deliver it to its programmer. These programmers could then take control of your PC and slow its functions or may even go to the length of crashing it. Worst part of it that the server of the Trojan gets loaded on your PC this is what uses the CPU, memory and of course your energy.
Trojans are also the main reason why malwares infect your system. Mostly your own PC is eating itself. Some crackers are known to spam the Trojans through mails to unprotected net users. Ignorant people then are victimized. These hackers may go to the extent of converting the PC into a zombie computer. The zombie computer later becomes a hub to transmit and spam such malwares. If they get hold of more such victims then they form networks of the zombie computers called as "botnets"
Now that you know how these Trojans gain an entry in your system, the question arises that, "how in the world, are you to stop them from coming on to your system?" "And if they are on the system, then how to block them and prevent any harm?"
Well then, there are some simple preventive measures, which can be administered by every single net user. First, is that getting your PC and net secured by good anti-virus software. Scan every single file that you download from the net. Get all your attachments scan before opening them and storing them on your PC. When reading your mails be careful not to open any suspicious mail or mails from and unknown person. IF you are receiving loads of them then select all such mails and delete them. You can even use the filter functions that are provided by your mail server.
