I have submitted a ticket to Kemper on this already. In the meantime I wanted to see if anyone could suggest a fix for this.
The story so far, I've had the KPA power head since 2013. Over the years I have had no issues connecting the KPA to the computer. A few years ago due to health issues I boxed the KPA up and put it in the closet where it sat for three years. I recently started using a newly legalized medication with amazing results. I decided it was time to break out the KPA again and updated everything (os, rm, windows 10, and any hardware you can update on the pc (bios chipset etc.). I had never had the KPA connected to this particular pc as I'd only purchased it within the last year. I connected the KPA to the PC and got the unrecognized device prompt . I looked in device manager and saw the "Unknown USB Device (device descriptor Request Failed)" error on the connection.
In the following days I have tried 6 different usb a-b cables (5 that were brand new). I have taken my KPA back to OS 1.8, upgraded it to OS 7.3.2 and then to OS 7.4.1. Uninstalled RM 3.0.131 and reinstalled it countless times. I have tried connecting the KPA another PC and it doesn't even recognize that a USB device was plugged in (no sound indications, no popups and nothing in the device manager). I tried connecting the KPA to a laptop and it behaved exactly as the second PC did. I connected the KPA to yet another laptop and got the same unknown usb device error I originally got the my 1st PC. Also both PCs and both laptops had RM 3.0.131 freshly installed on them.
I've tried using the useless windows Hardware and Devices troubleshooter. I have uninstalled/reinstalled and attempted to update the drivers of every possible usb listing in device manager several times. I disabled the USB Selective Suspend Settings. I've been into the registry to attempt a suggested fix. Nothing has worked. One thing I have noticed is that the unknown usb device error appears when I hook up the USB whether the KPA is powered on or not. Any ideas?