Thanks for the information.
Are they working in BIOS?
Have you tried different keyboard?
Did you test downgrading BIOS? version 0027
File name: WY0027.BIO
Instructions for BIOS recovery available below:
If you still have same problem, I recommend contacting Intel for possible warranty options:
Online warranty: Service Request Email
Chat support: Contact Support
I will try to change the bios back. With 0028 the results are fairly sporadic and hard to describe, for example after installing the driver again it took a few reboots before Windows detected the new devices and completed the driver installation process. And now I am getting inconsistent results where one of the devices (a relatively recent USB2.0 device that has fairly good support for the USB3.0 bus) works for a time and then eventually stops.
I am trying to isolate the situation, and have yet to try the 0027 bios. I’ll report back with my findings.
Well, it appears that waiting for a few reboots after installing the driver in the first place did the trick, and it doesn't matter which bios version I used. I also found the the "erratic" USB device disconnecting was happening when I connected with Microsoft's remote desktop. I wish I had nailed down the exact reason the local keyboard and mouse started working but that got lost in the troubleshooting.
So I will let this thread rest for now. Thanks for the feedback.