Your question is not too clear, which may be why there is no answer yet. Are you talking about the messages on the screen before Windows starts?
Normally, Windows will start up after a short delay, during which time you can press F1 (or sometimes another key) to enter the BIOS screens. If you do nothing, Windows will start up in a few seconds. If you need to change something in BIOS (not normally necessary), then you must press F1 during those few seconds.
If you're getting an error message, make sure that your keyboard is plugged in properly.