Problem with USB Devices on USB Hubs that Won't get Recognized after Rebooting Windows
A problem that you may run into with some poorly designed USB hubs is that the devices attached or plugged into the hub will no longer show up or get recognized in Windows after your system has been rebooted. You try powering it off and on, then unplug it, re-plug, reboot, etc...
Windows may even hang during boot while the USB hub is plugged in.