It was a struggle to walk him through the process, but this solution worked. Thank you so much, man. I wouldn't have thought to do that myself. Glad I learned something today.
A friend of mine has a custom built desktop that runs Windows 7 Ultimate Service Pack 1. The keyboard doesn't type "s". It will type Capital S if I press "Shft+S" but not Capital S if I have caps lock on. "Windows+s" results in "s" and keyboardtest.com registers the keyboard hitting the S key...