Trojans are malicious applications that pose themselves as legitimate software in order to trick users to install them. Once on the victim's machine, it may run any number of malicious process to steal vital information or inflict damage to other software.
This is a adware program that hijacks your browser to gooogle.biz. It redirects all your traffic through gooogle.biz and downloads an executable called superinstaller.exe to show you advertisements and install other adware bundles.
This is what the user sees once they surf from their homepage which has been changed to www.gooogle.bz.