Posted 15 March 2005 - 10:37 PM
Based on Grinler's suggestion, I figured there is no known malware that would cause this problem. I took the keyboard apart and discovered that it consists of 3 sheets of plastic with a circuit board appearance on two with the middle sheet acting as an insulator. Hit a key complete a circuit and the letter or symbol registers on your PC. Holes are evenly spaced throughout these sheets of plastic to fit over pegs in the base of the keyboard to keep it all aligned. Soda or juice, even just a few drops if you are unlucky, can enter through these holes and corrode the circuitry.
I found the c, s and d keys had corroded and the z key had shorted with the 1 key.
Replaced the keyboard and everything works fine now.
Grinler, thanks for the suggestion.