Hello,
You may try to repair your Windows Update by doing the following;
- Open Start screen, or on touch screens, swipe in from the right edge of screen and tap Search icon. Type " troubleshoot " and click or tap Troubleshooting.
- Then click " Fix problems with Windows Update" in the System and Security section.
- Click Advanced, verify that Apply repairs automatically is enabled and click the Run as administrator link.
- You might have to restart your computer for changes to take effect.
You may refer to as well on Microsoft's article on how to reset Windows update components;
https://support.microsoft.com/en-us/kb/971058