upgrade to windows 8.1

hi everyone I am trying to upgrade to 8.1 and i have manually tried to download update KB2917499 which is missing in my updates, I have KB2871389 already installed. When I try to download KB2917499 it tells me this (see attached) can anyone please help. regards calmatAttachment 64644 (http://www.eightforums.com/attachments/installation-setup/64644-upgrade-windows-8-1-a-capture.jpg)