My laptop is completely frozen on the restart screen and won't respond to anything. I have the old 4K touchscreen Inspiron 7559 running windows 10. Right now it is frozen on the restarting screen(the animation is stuck too) and I can't turn it off using the power button or remove the battery. I was playing osu! and right in the middle the keyboard stopped working and even the keyboards I plugged in didn't work, I tried to restart and now I'm in the situation I'm in now with the computer frozen and none of the USB ports functioning. A friend and I suspect it might be the motherboard but I don't know. I can't even force it to power down using the power button and can't remove the battery because it is built into the laptop. Anyone know what might be wrong?