When I started back with it, I finally called Kemper support after going through the same steps as before. I got frustrated with it and put it away for a few months. I tried new USB chords but nothing fixed the problem. I reinstalled all the updates available at the time on both the profiler and RM. The connection between my profiler and Rig Manager on both a Win 10 computer and a Win 7 audio computer built by Sweetwater just stopped one day over two years ago when it was still under warranty. 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. I've been into the registry to attempt a suggested fix. I disabled the USB Selective Suspend Settings. I have uninstalled/reinstalled and attempted to update the drivers of every possible usb listing in device manager several times.
I've tried using the useless windows Hardware and Devices troubleshooter. Also both PCs and both laptops had RM 3.0.131 freshly installed on them.
I connected the KPA to yet another laptop and got the same unknown usb device error I originally got the my 1st PC. I tried connecting the KPA to a laptop and it behaved exactly as the second PC did. 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). Uninstalled RM 3.0.131 and reinstalled it countless times. I have taken my KPA back to OS 1.8, upgraded it to OS 7.3.2 and then to OS 7.4.1. In the following days I have tried 6 different usb a-b cables (5 that were brand new). I looked in device manager and saw the " Unknown USB Device (device descriptor Request Failed)" error on the connection. I connected the KPA to the PC and got the unrecognized device prompt. I had never had the KPA connected to this particular pc as I'd only purchased it within the last year. 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 recently started using a newly legalized medication with amazing results. 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. Over the years I have had no issues connecting the KPA to the computer. The story so far, I've had the KPA power head since 2013. In the meantime I wanted to see if anyone could suggest a fix for this. I have submitted a ticket to Kemper on this already.
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