ExtenBro.AK is Trojan which will revise the registry entries and files without the user’s consent. This can lead to a change in the desktop background, System Language Homepage Preferences and Search Engine Preferences. The browser is redirected to certain unwanted websites and cause great deal of frustration for the user. Spam emails, pornographic websites and clicking on unverified advertisements – these are some of the most common ways this virus spreads. It also allows other malware to be copied into the system. In severe infections, the malware can lead to a system crash. It brings numerous error messages for even simple tasks.