Vundo is a Trojan virus that attacks the user’s web browser and displays various pop-ups and advertisements. The Trojan Vundo is also known by the names Virtuemonde and 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). There are many variants of Vundo and they act in different ways. This site 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 installed, the Trojan Vundo will display pop-ups within the infected web browser which gives false warnings of security threats and asks the user to install a rogue security application, which it claims to be legitimate. This virus will also change your desktop background. You will see some fake texts saying your PC is under attack. Here Virtumonde removal, you will read about how to remove Virtumonde from your system, while this website how to remove vundo has good infos about removing Vundo.
Vundo will change your screensaver for the feared Blue Screen. You will get lots of false security warnings. Any anti-malware applications that are already installed at the point of Vundo installation will be severely blocked or deleted completely. This trojan will cause any search you will try with Google to redirect you to compromised websites full of bad programs. Anything you will try to download will be done at a slow pace. In order to prevent you from deleting this Trojan, Vundo will disable applications like the Task Manager, the Registry Editor and even the System Restore.
The moment you are aware Vundo has infected your system, you should delete it from your computer as soon as possible. Do it professionally: use a good security related program to do a full system scan so you can detect any Vundo infections on your system.
Due to the fact that manual removal of Vundo is also possible in some cases, an attempt could prove to be successful. In order to do this, it is necessary to unregister its DLLs, delete its files and remove its registry entries. You should restart your computer in Safe Mode before attempting to remove Vundo manually.
From there you will need to scan your computer using whatever security client you like best. After that, you can fully clean your PC from Vundo either manually or with your antivirus product.