My T100TAF did the same thing this week. After reading several attempts at solutions, in the Device Manager (get there by touching the start button, typing Device Manager on the keyboard screen), I deleted pretty much all the Asus HID devices, control devices, mouse devices, and keyboard devices. I made sure to leave the touch screen HID device. Then, without adding the devices back in, I restarted the Notebook with the keyboard docked ... viola, the keyboard and mouse cursor were back.