So I switched to a Kingston 4gb sd card and made sure that nothing was plugged into any of the Wiiu's usb ports and the same thing happens. Can't install new cios, crashes if I idle on the HBC for too long, and crashes if I try to load into USB loader gx
I wouldn't use a 4gb sd card, use a 2gb max formatted to fat 32.
Did you try what cyan said and disconnect hdd?
Can you use an alt sd card 2gb max like cyan suggested.
Basically your ios are fine. Are you using the most recent hbc. Are you using the most recent installers. Have you got any hardware at all that could be causing an issue? It can only be an issue with either:-
1) your hbc is outdated.
2) your using an out of date wad manager that needs ios236.
3) you've installed a channel/forwarder for usb loader/something else for wii/outdated
4) your external hardware is causing an issue.
It cannot be an issue with your wiiU:-
1) your vwii ios are all original.
2) your cios are correct and up to date in the correct slots with the correct base.
I don't think I can help you past these issues unless you can tell me exactly, step by step what you did to get to this point. Your ios are all correct for vwii...
Cyan could he re-smashstack and hackmii from scratch, overwriting hbc and reinstall d2xcios just in case something somewhere was corrupted...do not do this OP this is just speculation.