Spyware is a computer monitoring program that will secretly install on users’ computer and control computer activities as it likes without your permission. Spyware can track your activities and gather your personal information, for example, every websites you visit,every email you read or write, every chatroom your enter, or your credit card information. In a word, spyware is a andgerous program to your computer…

In computer, a Trojan horse means a very dangerous program in which malicious or harmless programming or data is contained. It this way, once the program install on the computer, the Trojan horse can easily control the entir computer such as allows remote access , damages system core files, collete and send users information to third-party members…

A backdoor in computer system is a program file that can destroy system integrity. They are the most widespread and most dangerous type of spyware because they have the potential to make changes to your system which allows remote administration of your system, use your Internet connection to send spam, collect/ steal your online/offline password/banking information, modify/delete system necessary files, etc…

A computer worm is a malware computer program which can replicate itself and then send numerous copies of itself to third-party members without users’ permission.Unlike a computer virus, there is no need for worm to attach itself into an existing program. However, it will greatly slow down computer performance and make your computer crash ramdomly because of inadquate system resource…

Adware is a type of advertising-supported program, which is designed to track your browsing habits so as to display annoying commercial advertisements. These ads can be always in a form of pop-ups, which constantly pop up when you are using the computer and can not skip easily. These ads will sometimes navigate you to some unsafe website which plated with malicious codes…

A rootkit is a program that allows constant privileged access to a computer and cleverly hides itself from administrators. Once installed, it will allows the hackers to mask intrusion and obtain root or privileged access to the computer or, possibly, other machines on the network. Seriously, a rootkit may monitor traffic/keystrokes, create a “backdoor” into your system for hackers’ use, etc. So do not hesitate to remove it from your computer!…

A fraud tool is a malicious program that can disguise itself as trustworthy program, for example, a useful anti-spyware/virus program, or an helpful registry cleaner toolkit. Actually, it is normally designed by hackers to trick PC users into purchasing the fraud applications by using constant pop-ups, fake system scan results. Some fraud tools may be malware and would bring in permanent damages to your computer!

A suspicious file or suspect file is not a typical virus/spyware as we often define. It is a file that does not indicate the aim specifically and works wantonly on the virus-sensitive parts of the computer. Normally, a suspicious file can be virus, Trojans, spyware or adware. If you are not sure whether the suspicious file is a virus or not, do not randomly run it for it may attack or destroy your whole computer.

A Dos virus is a big threat for those who do not have good defence installed on the computer. Dos viruses are very risky malwares designed to search and delete *.COM and *.EXE files on the hard drive, or corrupt necessary system files by writing invalid data. The loss of these files may greatly slow down the computer, or make it run crash/freeze up randomly. If you keep on running your infected system, it will become more and more unstable, leaving your privacy unprotected.

A constructor, or virus constructor, is a malicious program attempted to creat new viruses on the computer without having any programming skills, as it has an interface that allows to automatically decide the characteristics of the generated malware such as type, payload, target files, polymorphism, etc. Constructor may seriously break into a system by making use of the fragile programs or via infected application downloads and then gather and send your important information to a remote controller.

An unknown spyware/Trojan/adware/virus is like a virus which presents a serious vulnerability that should be fixed immediately. Though not identified to be a specific spyware/Trojan/adware/virus, thus unknown threat may cause serious harm to your system and will likely result in numerous problems, for example, slow PC performance, loss of important data, or leaking personal privacy to websites.