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.
EXPLODER does a proper shutdown of Win 95 from a web page. Once this application is installed it can run as a normal program on your computer, often hidden to the user. In addition it has full access to your system and can download and install other applications as well.
More over there are possibilities that EXPLODER is used in a way that would produce an unwanted shutdown of a person's PC by placing it in an unexpected location on a web site.