phantom keyboard input problem

Hello

I am kind of out of ideas with the problem. What is happening is, it is like the N key on my keyboard is being pressed and held down. This is evident anytime you tab to or click on anywhere you can type, like the internet address bar, any search field on websites or within windows. Also when just on desktop, there is a constant highlighting of any icons that begin with the letter N.

I thought maybe the ol trusty G15 keyboard may be going out so logically I unplugged it. No change. Still filled up with N s. I did full system scans with Norton 2010 and adaware and the thing seems clean as a whistle. This is a system that I built from different new parts earlier this year. I can give part numbers if it will help but I am hoping for a really quick fix here before theys a shootin between me and my computer illiterate dad lol.

But that is literally all that has happened. Just all of the sudden infinite Ns started inputting to any field. You can still type in these fields, but all the Ns are still there among what you type.

Thanks for any light you cann shed on this

Sorry, I realized I accidently posted this in the Intro section.. my bad

I thought maybe the ol trusty G15 keyboard may be going out so logically I unplugged it.

I would go further by replacing the keyboard with a different one and rebooting. Also, if you are using a keyboard with a PS2 connector, try a new one with a USB. Report back the results.