Currently have two games on my HDD that I play. I'll be playing the game and it will loose sound and then freeze. I do not have an actual wii u disk to try out to make its not the system, but I was hoping someone on here would have an idea. I have the HDD sleep mode disabled while the system is on and I saw improvement for awhile, but still having issues. Could the system be going bad? I bought it off a lady on craigslist, but not sure how much they used it.