Hello. I purchased the aforementioned tablet today, and am already experiencing issues. I have not inserted an sd card, downloaded any apps or even used the tablet period. The keys for "M", "K", and the "." on the touchscreen are completely unresponsive. I tried rebooting, and am now stuck at the lockscreen because the lock mechanism is misbehaving as well. Is this an issue I can correct myself or something for the warranty to consider? Thank u for ur time.