I found a neat trick (that makes the browser work really funky but works). Connect your Wii U to a router, go in the settings for the connection, change the DNS to "do not auto obtain", then change the first one to 192.168.0.0 and the second to 127.0.0.1, should only let you access local IPs to run programs no additional programs needed
What will that do, precisely? Does it have anything to do with blocking Nintendo updates? Sorry for the ignorance, but my router doesn't give me an option to block them and I was hoping you had just found a way around it.