Remove 'V9.com-Toolbar' from IE/Chrome/Fierfox

My homepage is always redirected to v9.com? What is v9.com? How can I remove it completely?
V9.com toolbar is a pesky homepage hijacker which can modify your default setting of browser like Google Chrome, IE and Firefox. Once installed, it can replace your homepage without your consent and set you in v9.com. v9.com looks similar to other searching engine but it is not safe to do any online activities on it.
Your computer can be infected via spams and freely download software. You should be very careful when you are recommended to download or update applications.
Help to remove similar computer threats can be found in: http://www.removalvideos.com/