Sometime using Internet or opening an email attachment we may accidentally click an application to install by allowing it. And we even doesn’t have any imagination what we have done but we are happy with that we have installed a very useful application. But the havoc start when we start getting some very annoying massage like… This computer is infected, Download a new antivirus, some sort of antivirus list or computers working behaviour goes in a very strange way.

The main cause for these behaviour are A Trojan Horse Virus which are still today are very difficult to remove. They left their traces in the exe files of the several application installed in a system so when we open or execute the application it load in the system memory and start infecting other files in the computer or gathers important information. It was designed in such a way that after collecting information it send them to its developer by which he can take control over your system.

We can easily find when our computer is infected or not if we feel our computer performance becomes very slow, unexpected popup without any activity from user and very frequent computer crashes.

This computer viruses comes mainly through several porn sites or as an email attachments so be careful when browsing any site when it says that you need to install a missing plugin. Have a search on google about that add-on or update before applying them. And while opening any of the email attachment always look for its source of authenticity and if not sure always be cautious.

The best way to prevent a Trojan Horse Virus from entering and infecting your computer is by never opening any email attachments or files that have been sent by unknown senders. However, not all files we received are not infected by the a virus but precautions is always a better way of protecting your PC against malicious programs.