The delay for the stuff to appear after you type it is just because your computer is too busy to be bothered with what you want it to do.

It's probably running one of those "background processes" that's intended to keep all your computer's innards neat and pretty.

If it's busy doing something else, you'll often see the "HD Activity Light" (often near your power switch) lit up or blinking, which is a clue even if it doesn't tell you what it's doing.

A reboot will often clear things, until the computer has time to decide again: "I can do something more worthwhile than what this dummy wants me to do."

Or the delay could be because that's how long it takes the keystroke logger that some malware put on your computer to send a copy of what you typed to Nigeria. It makes you wait to be sure that you don't type something more before it records all your personal data, so don't mention how long you've been wearing the same pair of skivvys - if you'd be embarrassed having Nigerians know.

John