.dll PRoblem and i cant seem to fix it

when i open the patch of the game it all is oke it loads regularly i have the game on my computer to and there it works fine but we want 2 play with 2 people in 1 house but when i launch in my laptop it looks all good with the patch loads good but when i press start i get a white screen with the message my file Shunimpl.dll file is corrupt i tryed registry boosters and lots of that stuff but nothing seems to help i was wondering is this a familiar problem or is it just me and can you help me with it ?