svchost.exe is an important executable that is part of windows. It allows 16 bit DLLs to run nicely in a 32 bit environment. [EDIT: Actually it's more complicated than that. But I do not have time to explain. Plenty of references on the internet for it.] The question is what those DLLs are and what they do. It could be regular Windows functionality that starts them up for legacy devices and programs. But also 3rd party applications that do stuff under the hood. I don't know of a way to figure out what dll's are behind it. Eitherway they start up automatically so there is no point in killing them. Though it might help short term.
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