This is a Toshiba Satellite L655 running Win7 Home Premium.
The right side numbers keys when NumLock enabled, repeats numbers constantly. Disable NumLock and those keys obviously don't work. I've tried checking Ease of Access/Mouse keys and it IS unchecked.
Then I decided to replace the hardware. Bought and installed wireless mouse and keyboard and the problem persisted. What can be done to resolve this issue....
I did not find the right solution from the internet.