Q:

Keyboard mapping gone wrong

I've got an old Acer Aspire V5 with touch screen. Recently, I broke the touch screen and got to unplug it, because of phantom spam click on the screen, in order to be able to deactivate the touch screen.
I then plugged everything back in, and since, I've got a weird problem: the key mapping of the keyboard is wrong. QWERTY touches are alright, but u => 4; i => 5, o => 6. Same thing happen from the second line. The real numeric keypad doesn't work.
I tried to uninstall the driver and reboot but it didn't fix the issue. I don't see any fn + any that could enable/disable this feature:

Before re-installing Windows (8.1), is there any other thing I could try?

A:

Try Fn + F4.
OR
Fn + ScrLock.
OR
Fn + F11.
This happens when the Num Lock feature found on lots of laptops is activated.
It can vary depending on laptop make and model but it'll be something like that.
Edit - I also have heard that Alt + Numlock works on acer laptops. Try that.

