You might have heard about Vundo. This is a known trojan that is infecting computers and compromising web browsers. Infected computers will have pop ups and ads being displayed. Other names for this Trojan are Virtuemonde or Virtuemondo. This Trojan will infect your PC via emails (spam ones). Those emails will be full of links redirecting you to hacked websites. Those websites will try to exploit problems in your browser like security related or plugin ones (Java is known to be used for that). This Trojan comes in many variants that have different ways to hurt systems. This site Computer Virus Removal has good infos about virus removal.

This Trojan wants to attack your Internet explorer via BHO. So it will try to change how you are going to surf the Internet: you are going to get ads about some antivirus solution you should install. Once it is on your computer, Vundo will show you popups coming from your hacked browser saying your computer is under threats by viruses, worms and such. So Vundo will try to make you install some fake security related program. This virus will also change your desktop background. You will see some fake texts saying your PC is under attack. Here Remove Virtumonde, you will read about how to remove Virtumonde from your system.

Vundo will change your screensaver for the feared Blue Screen. You will get lots of false security warnings. Vundo will block, or delete, any security related applications you may have installed on your computer system. You will be redirected to compromised web pages full of spyware, viruses, and more, the moment you will use Google Search to search for something. Anything you will try to download will be done at a slow pace. Your System Restore, Task Manager and Windows Registry Editor will be blocked by this trojan so you cannot delete it at all.

The moment you are aware Vundo has infected your system, you should delete it from your computer as soon as possible. Use a reliable antivirus package to do a deep and full system scan of your computer system to detect any Vundo infections on it. That’s the professional approach to it.

You might have success if you do try to remove manually this Trojan from your system, it has been done before. If you want to manually remove Vundo, you should unregister any DLL associated to it, delete its files from your system and remove all registry entries part of this trojan. Before removing this virus manually, you should restart your computer system in Safe Mode.

With your preferred antivirus solution, simply scan fully your computer system. Once done you can manually remove the traces found or just remove them with your security client.