On this forum another person had the same problem I currently have. I attached the link below. I've done everything stated and more and my problems parallel his to a T. It works in safe mode, doesn't when not in safe mode. I have uninstalled and reinstalled drivers, updated everything, even got a new keyboard. Please help!!!!
Solved! - Computer won't type one specific letter
I don't think it's the keyboard. I use the on screen keyboard to type. I have one specific letter that will not type it doesn't work with regular keyboard or on screen keyboard every other key works fie. The letter does type if i a word if I use the word prediction just ot if I type it.