Bill D, you probably guessed that I failed to refresh to read your answer before posting mine, otherwise I would not have needed to. Glad to see you learned something yourself though ;-).

Bobert, please tell us whether you actually can type ahead and all letters eventually arrive, and what you see in the task manager (leave it open!) while the response is slow. Does the effect occur in all programs or only in a particular one? In the latter case the program (which one is it?) may just be badly programmed, e.g. permanently "swapping" between working memory and the harddisk. You may consider buying more memory or using another text program.