We need more info to give you specifics...what cpu and what MB? The basics are to go into your bios and reduce either your multiplier or your base clock frequency. If you don't know what those are, check out the overclocking guides in the CPU section and they will have screenshots that will walk you through it....Although I think your problem isn't a fast processor, but a fast internet connection. Most software has a way to throttle your internet speed per application or instance, so i would look into doing that first.