Yes, you didn't read the tutorial carefully.
You're not supposed to link multiple variants of one library at the same time. Link only either of sfml-system.lib, sfml-system-d.lib, sfml-system-s.lib or sfml-system-s-d.lib. Not all of them! Which one you have to choose is explained in the tutorial. Read it again.
As you downloaded SFML 2.1 for Visual Studio 2010, I assume this is your compiler, correct? Or which VS version do you have?