Hello @HG91,
Thank you for your post on the Startech.com Community!
I see that you had contacted our Technical Support team for live support and during the troubleshooting we determined that there was not a USB-A to USB-B cable connecting from the computer to the KVM. After connecting this USB cable between the computer and KVM the mouse and keyboard were then able to communicate with the computer.
I am glad you were able to resolve this with our team! If there is anything else we could help with, please let us know.
Lukas T