Windows 10 USB Keyboard / mouse mystery

I have a Logitech Wireless KB / mouse on a Unifying plug. and a wired gaming keypad [Cybersnipa].
Under windows 7 they were a little funny, but I finally got them working plugged into the back of the machine. But only certain ports seemed to work. Thermaltake Armor 90 case. ASUS P8Z68-U GEN 3 motherboard.

Upgraded to Windows 10 and all was well.

But then I unplugged everything to blow the dust out of the machine - wheew it was really time for that - and now I have to plug the Unifying receiver [REC] and CyberSnipa [CBK] into the top of the Armor 90 case. Other ports do not work.

I checked the device manager and there are no little funny yellow boxes saying that devices are not found.
And when I unplug one of these devices and plug them into the back ports, windows ding-dongs and there is a little driver loading animation in the task bar. And I move them around and each time this happens, but the REC and CBK only work in these two ports and not in the back after the ding-dongs.

What's up with USB??

I'll check my BIOS and make sure that Legacy is not checked for something on the USB.

Any other ideas?

Thanks,
wg

OMG that was it!! Disable Legacy mode!!! and don't cross the streams!!!
wg