Win32.Nimnul is a dangerous trojan infection which creates a start-up registry entry to run automatically every time you start your computer. Win32.Nimnul changes Internet settings and redirects your web browser to unwanted websites. It may change your desktop background and adds strange web shortcuts to the desktop, which usually leads to advertisement web pages or adult websites. Win32.Nimnul is able to modify other files by infecting, pretending, or overwriting them with its own body. Win32.Nimnul is able to install spy or keylogger programs which are used to steal private information, such as credit card details, login number, password, etc. Win32.Nimnul is also used by rogue anti-spyware applications to download themselves to affected computers.