Angels have the Phone Box
Hi Bradex and welcome to Tenforums.
Frustrating, I know...
Please try running sfc /scannow to check the health of your system files. We're looking for "no integrity violations found" as the result. If it does find errors, please reboot and run it again - it could be run 3x or more until things are sorted. Then try a clean boot, and see if the update will install that way.
If you want to wait it out for a while, there are a couple things you can do - but these disable WU completely, and I wouldn't recommend leaving things this way:
Windows Update Automatic Updates - Enable or Disable in Windows 10 - Windows 10 Forums
Options 1&2 can be done only on a W10Pro system, while Option #5 can be done on both Home and Pro.
Hope that helps!
Edit: Here's another option to show/hide updates (hidden updates will not install):
Windows Updates - Hide or Show in Windows 10 - Windows 10 Forums
Not sure if you need to get the update installed first, then uninstall it and hide it (haven't had to do this myself yet). I think, as long as it's waiting in the wings, you can hide it.