Thanks for the link, but apparently a ...hub.inf is expected as well as the ...xhci.inf file, but there isn't any. So the installation stalls at this point.
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Oops. I forgot to run the kb file. All is well now.
It remains to install the chipset and graphics drivers, altho it does not appear that the chipset driver is needed. The Realtek audio and lan drivers from the H310 board installed with no problem, but, then again, Realtek drivers will install on anything that casts a shadow. Thanks again.
Joe.