I dont think anything vWii related can affect WiiU side? But from what you have said you obviously have some issue going on with Wii U.
What is your setup?
SD:\Retroarch
USB:\Retroarch
USBFAT32HDD:\Retroarch
GC\Wii Games from a Fat32 USB HDD?
What is your setup?
SD:\Retroarch
USB:\Retroarch
USBFAT32HDD:\Retroarch
GC\Wii Games from a Fat32 USB HDD?