SVCHOST.EXE Virus?

On Processlibrary it says that this is a virus and i should remove it immediately. What is it really? I see some sites say it's just a default process and some sites say it is a virus. I have 7 of them running on my processes so i need an answer.
What is it and if it is a virus how do I remove it?
Thanks
What is it and if it is a virus how do I remove it?
Thanks