How to install logo's A picture speaks a thousand words

This is what your startup logo looks like (or something similar). It appears for somewhere between 3 seconds and 2 minutes, depending on your machine speed and network/SCSI complexity.
This logo can be found at C:\LOGO.SYS
To install a startup logo, overwrite this file.
If you can't find this file it may be because you have a compressed disk, in which case the file is loaded from your boot drive, which is remapped under windows.
If you know you aren't using a compression manager it may be because it's hidden. The best way to test this is to click Start -> Run then type
"command /c attrib C:\LOGO.SYS -s -h -r" - without the " " and hit OK
Go back to the windows explorer and refresh the display (hit F5)
If you still can't see it, it's because the logo is being loaded from C:\IO.SYS. NEVER DELETE THIS FILE!
Windows(DOS) searches for LOGO.SYS first, and if it doesn't find it then it uses the copy in IO.SYS. So just copy the new logo to C:\

This is what your wait logo looks like (or something similar). It appears for somewhere between 1/4 second and 15 seconds, depending on machine speed, OS version, physical memory installed and the memory requirements of the programs ran in that session.
This logo can be found at C:\WINDOWS\LOGOW.SYS
To install a wait logo, overwrite this file.
If you can't find it, it may be because your windows directory isn't C:\WINDOWS, if so, substitute the C:\WINDOWS part for your windows directory.
If you still can't find it, it may be because it doesn't exist. If this file is removed windows simply displays nothing.

This is what your shutdown logo looks like (or something similar). It appears for somewhere between 1/4 second and until you turn your machine off, depending on your power supply type.
This logo can be found at C:\WINDOWS\LOGOS.SYS
To install a shutdown logo, overwrite this file.
If you can't find it, it may be because your windows directory isn't C:\WINDOWS, if so, substitute the C:\WINDOWS part for your windows directory.
If you still can't find it, it may be because it doesn't exist. If this file is removed windows simply displays nothing.

Displaying nothing is fine for ATX systems, which turn them selves off anyway, but it gives AT system owners the feeling that their machine has crashed or is unsafe to turn off. Infact it is a common technique employed by computer technicians that when an AT system locks up at the "wait" screen to delete the wait screen, and replace it for the shutdown screen file. This gives people the impression that it's fine to turn off their system inspite of the fact that nothing has been fixed. If you ever do encounter this problem rest assured that failed shutdowns are NEVER related to hardware problems. 15% of the time it's caused by bad drivers or bios revisions, 30% of the time it's caused by buggy virus scanners (30% of all Windows problems result from buggy virus scanners), 50% of the time it's caused by OSA or FINDFAST which are installed by default with office 97/2000, and the remaining 5% of the time it's caused by corrupted system files or aliens experimenting on your computer as you sleep.