I have a similar problem as you do. Yesterday I used "XP LogonUI" to change the boot screen, but that "logonui.exe" seemed to be crashed, leading to an error. Then I deleted the crashed file and restart XP LogonUI again... IT DOESN'T WORK! I've tried to restart the computer, copy some healthy "logonui.exe" to c:\windows\system32 many many times...at last I failed! My boot screen didn't come back~ God, would somebody kind tell me how to recover it? New version of the XP LogonUI could help me or not? Thanks a lot!