Change Windows Welcome and Exit Screens
To change the welcome screen in Windows, create a BMP file (or bitmap file) with Windows Paint and name it logo.sys and place it in the C: directory.
In the C:WINDOWS directory, you’ll find the names of files that start with logo and then a letter and have a .sys extension. These are exit screens. You can do the same with them.
You might want to copy any of the files that you are going to rename to another directory so that they aren’t overwritten in case you want to restore everything back to the way they were beforehand.
This works in Windows 95 and 98.
To bypass the logo at boot-up, edit the msdos.sys file and add the line LOGO=0 (note that it’s a zero after the equal sign, not a capital letter O) to the Options section.