so my Acer Chromebook with a touchscreen completely froze and I have no idea what to do. I tried to shut it off but it won't work. Apparently, you can see the mouse in certain places but when you click on something it doesn't work or react... none of the keys work either. refresh, backspace, search-nothing, nada. PLEEAAAAASSSE help me out. I don't know what to do and under circumstances, I have limited time.