Check your Internet connection
Before you try anything else, you should make sure that your PC is connected to the Internet. You can try using the Internet Connections troubleshooter that will automatically fix some common problems with going online.
• Open the Network troubleshooter by swiping in from the right edge of the screen, tapping Search (or if you're using a mouse, pointing to the upper-right corner of the screen, moving the mouse pointer down, and then clicking Search), entering Identify and repair in the search box, and then tapping or clicking Identify and repair network problems.


Wait a few minutes and try again
Many connection errors are caused by temporary problems with the Internet. Wait a few minutes, and then try running Windows Update again. 

Incase if you are still having the issues, do contact our experts for quick resolution.