New
#11
Welcome to TenForums @Reducto
It will complete (eventually), just leave it to run its course. If you can't wait, you could cancel the cleanup (though in my experience it takes nearly as long to cancel as it does to complete). For future reference, you can use @Cliff S's faster way to clean up just the Windows Update. See:
Cumulative Update KB3194798 for Windows 10 PC & Mobile build 14393.321