My Outlook Express is suddenly not Genuine

I seldom open my outlook express but when someday I open my outlook express suddenly some windows pop out appear show that my outlook is not genuine I don't know what is the problem about this one but I already got my outlook express installed along with everything in my Vista, I wish someone can sort this weird things up because when I first use it there was nothing's wrong before,Brink can you help me what should I do with this or should I just simply uninstall it since I don't really need this windows feature:huh:

this is the screenshot

Follow this thread about the second or 3rd post, there is a link that will tell you why it is not genuine. Wish you luck
Not Genuine Message