you can press the function key if it didn't work you can plug an external mouse and reinstall the driver in case you don't know how to do this you first need to delete the current driver to do this right click on windows logo press device manager click mouse and other pointing devices delete the driver but be careful don't delete the driver of your external mouse then download the mouse driver you want from here https://www.asus.com/Notebooks/Eee_PC_12... and i think this will fix any problem you have please tell me if this work and tell me if it doesn't thanks,
Try booting into Safe Mode, which temporarily disables all 3rd party apps. On most Android devices, while powered on, press and hold Power until the Power Off menu appears. Press and hold the Power Off selection until the Safe Mode prompt appears. Tap OK.
try this Press and hold the home button, then the up-volume button, then the sleep/power button (so all three buttons are now pressed and held) --- it takes a while, but the white screen will go away and then after another 10 seconds or so (still holding btw!) the apple logo will come up, release the buttons and then wait, it'll boot normally again in a minute or two.