Is XPS User a Harmful Program?

I am trying to uninstall unnecessary programs on my computer because it is no longer responding as fast as it used to. When I go to All Programs, I see this item there that says XPS Viewer. I want to just uninstall it because I don't think I have ever used it but I am afraid that it could be useful in the future. I don't even know what it does. Could somebody please enlighten me? Thanks.
