Are you having boot up problems and would like to know what it going on behind that Windows Loading Logo? To find out, you can disable the splash screen by making a small change to the Boot.ini file. Maybe you can get a hint or two by viewing what has messed up your OS or just for curiosity,once can disable Windows logo screen and view boot operations.
Follow these steps (carefully!):
Once the computer restarts you will notice that the Windows Splash Screen is no longer present. Instead you can observe some of the boot up operations that Windows XP performs during the startup stage.
To re-enable the splash screen, follow the same procedure but remove the "/SOS".
Thanks (dark Hackerz)