01-06-2016 09:47 PM
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01-07-2016 09:09 PM
There is usually no driver associated with a built-in keyboard. It sounds like something is off with the hardware.
It's rather unlikely that the actual update to Windows 10 would cause this. It is possible that the connection between the "5" and "6" keys are shorted, and the computer stops typing "6" after a few times.
If you have a toothpick handy, run it around the sides of the 5 and 6 keys while the machine is powered off. It may clear any gunk holding the 6 key down.