Help *PLEASE* .DLL and USERENV.DLL problem

[confuzzledDuck]

all my friends have limewire and they say its awesome and since my ares lite isnt working anymore they said i should download it, well i tried the first (recommended) link and it said something about .DLL and USERENV.DLL so i tried the other one and it loaded fully then when i ran it, it went to the blue systems error screen and said "a fatal eception has occured at 0000:0000FF00" im all like sh*t wtf and my parents are all like, you break my comp i break your neck so what can i do to fix it or should i just remove it? ive tried reinstalling but it just loads 3 quarters of the way then goes to the system error screen. (PLEASE HELP)

I type alot dont I?