EVM is a mod made for esf, i dont really know a whole lot on it, so dont ask me any questions about it, plus the administration doesnt really like it when people ask about it so try not to post about it here, if you are interested then go to their forums, i believe they have some.
Anyway, do you have any programs like AIM or adware/spyware going on in the background like grega asked?, they can use your internet connection to do stuff too. Also try ending some programs running in the background using your task manager, just be sure to only end programs that are run by the user though.