2 New Dell Desktops arrived -

Windows 7 Pro, Intel, i3

Unboxed, hooked up peripherals in shop, when I go to Windows Update, it never ends "checking for updates". 

I have:

KB3135445, KB3161664, KB3168965, also WindowsUpdateDiagnostic

There seems to be no rhyme or reason to getting updates on the computer before I deliver to staff.

1.What is the working resolution to this issue?

2.Can I just depend on automatic updates to one day download and install the 200+ updates?

Thanks,

Darryl