I can't login to my windows 8.1. It lets me press the space bar, enter and sometimes it'll let me press random numbers and letters. The space bar works. I have tried taking it on and off the filter keys and shift lock through the easy access thingy. As well as attaching a usb keyboards.. Still won't work. I also have tried to use the onscreen keyboard and it wont let me type. I have an hp labtop with windows 8.1 please help!