Unable to unmap keys

Nov 17, 2014 at 7:38 AM
Few months before I could not use my laptop key 'n' somehow. there was no effect by pressing it. Since I came across to the SharpKeys application and installed it. I tried to map n key. but it did not worked. I thought it might physical issue. But when I tried external keyboard, which also not performing anything. I tested keyboard on another machine where it is working perfectly fine.
After that I tried to remove SharpKeys application from laptop. restarted it, but didn't worked. My understanding is SharpKeys must be registering key mapping somewhere in windows registry. How can I remove this registry entry. SharpKeys is uninstalled totally from machine.
How can I make 'n' key effective ?