You can prevent the display of the Windows logo startup splash screen by setting the logo parameter in the Options section to zero. This option is particularly useful to leave the bios and boot messages of the various hardware components in your system displayed on the screen during the boot process. It is recommended that you disable the splash screen after installing new hardware or when you have hardware problems.
[Options]
Logo=0
See also LOGO.SYS on how to modify or replace or animate the Windows logo startup splash screen.