2 years i cant get rid of that. I donk know whats deals the problem but i know it has something to do with facatory deffect ( could not find many posts about that ) or usb controller in older mobos.
I have p8z68 v pro from asus and when i plug sova my bios (uefi) detects 4 keyboards if add mouse i got 2 detected. no problems when unpluged.
PSU is ok and everything is stabile untile i plug sova. Windows 10 also is affected. By testing all the settings in bios i managed to get this keyboard "work" but with issues.
Am desperated.... But who else whould answer 3yo post ;)