I am trying to install windows live messenger 2011. I just spent the past three or four hours installing every new update that windows update offered me. It says that windows is up to date and that there are no new updates. 

But when I try to install windows live messenger again, it still says I have to install Windows Platform Update. And it tells me to check windows update to find out how to install that. But either I already installed it and live essentials doesn't recognize that, or I really do not have it. But I have no way of getting the platform update, so I'm stuck.

How do I get the windows platform update without using windows update? And/or, how can I get windows update to supply me with the platform update? 

Thank you.