I bought a used wii ufor the first time 16 days ago. It functioned well till yesterday. I hopped into the friend list app, suddenly the screen turned black and an error showed up saying there is a problem with the system memory. It again displayed on mario kart 8 (digital). It didn't appear on the physical games though. Im gonna test all of them tomorrow and see the outcome. I will edit this post or repost a new one once I give it a try. I dont know what caused this. People say when you leave the console unused for a while it bricks up, but I always boot up my wii u. Others say super smash brothers might be the reason which I don't have, or perhaps the seller who sold me it didn't used it for a minute. I have been experiencing a lot of freezing as well whenever I try to download physical games, which include online service, or I leave the console for hours untouched. At these points I power off the console completely (holding for 4 seconds) and turn it on afterwards each time it freezes. This is the only reason I have come up with. How do I fix this? Do I live with it or buy a new unit?