Far better to get MS to fix it for you (free for WUD), than us.
Here's the relevant paragraph
Note If you would rather send your issue to a support professional and have a possible solution send to your e-mail address instead of troubleshooting this issue yourself, click Microsoft Online Assisted Support (no cost for issues related to getting updates) in the open window that contains the installation error code. In the issue report that you will be asked to send, make sure that you mention the installation error code that you noted in step “d.”