At times, the tab randomly stops working. Once I restart the computer it's working again. Has anyone seen something like this before?
I'm using a TypeMatrix keyboard.
Intel(R) Core 2 Duo CPU E8400 @ 3.00Ghz 3.62 GB Ram Dell Optiplex 780
Maybe the keyboard is getting faulty. How old is it? Do you press tab a lot? I know that keyboards are very resilient, my daughter beats on mine daily, but they do break. I agree with Kyle, try using another keyboard to see if that fixes it.