Chosen Solution

My Nextbook heats up quickly then shuts done.

I have a Nextbook Ares11A, 11.6" 2-in-1 Quad-Core Android Tablet. I hear no fan. Next step?

one of 2 things, either your fan is done and the CPU is overheating and is protecting it self by hard shutting down. or your heatsink is clogged and cant properly ventilate and doing the same and shutting down. you can open it up and clean it and you should probably order a new fan and heatsink paste to replace the paste and fan while youre in there. good luck