The most famous malicous programs for Windows in 2009

This is a list of the new viruses and Trojan horses that infected most number of windows based computer systems in 2009. These viruses, worms, and Trojan horses adopted most common and new ways to infect and destroy PCs. Here we look into the most famous of all the new viruses, worms, and Trojan horses that created havoc to windows users in the past year.
1. WMA/TrojanDownloader.GetCodec: The systems infected with this this trojan will get a notice to convert the audio files in your computer to .wma format. It will also contain a link to download the codecs required to make this conversion possible. If you click on this link you will get into trouble. The Trojan will download more malicious code into your PC.
2. WIN32/Conficker: Confiker is one of the most popular worm of 2009. It is targeted towards windows based systems. It uses the autorun feature and USB storage devices to infect PCs. When your PC got infected with this worm the worm will start downloading more malicious code and slow down your network and destroy your PC.
3. WIN32/AGENT: This is a dangerous virus targeted towards windows based PCs. This virus copy itself to a temporary location in your computer. Once the virus start working in the background it will add new start up entry values to the system registry and create copies of it in different locations in your computer. Then it will start stealing and sending valuable information from your system to the intruder.
4. WIN32/QHOST: This is a malicious program that infects your PC. This will convert your PC into a zombie. It will make changes the DNS settings in your computer. It exploits the vulnerabilities in the Automatic Updates feature in windows. When you try to auto update the system you will be redirected to malicious websites and malicious code will be automatically installed in your PC.
5. Win32/PSW.ONLINE GAMES: This Trojan targets gamers. When this got infected in your PC it will gry to steal your personal and financial details. This trojan mainly attacks online gamers.
6. WIN32/PACEX.GEN:  This is a torjan that uses an obfuscation layer in order to steal sensitive information from your PC. There a number of trojan programs that use the same technique to steal information from your PC. So beware of this kind of malwares and remove them from your PC if you suspect this kind of program has infected your PC.

You can use a good antimalware program to remove these viruses and Trojans. It is better you use more than one system security tool to remove them. Always use updated antivirus and antimalware programs. In this way you can keep your system protected from new and recent malware attacks.