Method 1:
I would suggest you to check if the on-screen keyboard works corretly for the same profile on diferent hadware.Follow the steps to check with On Screen Keyboard:
a) Press Windows Key +W and type Start On-Screen Keyboard and hit Enter.
b) Click on Start On-Screen Keyboard.
Method 2:
I would also suggest you to check if the same issue occur in Safe Mode on Windows 8 desktop PC and check if the issue occurs there as well.http://www.win8solution.com/2013/09/windows-8-startup-settings-including.html
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