Logon studio creates the correct logonuiX file and correctly switches in the registry between this and logonui.exe but the file does not run. The login screen that comes up since I tried one of your competitors (now uninstalled) is one I have never seen before but looks like a genuine Windows login of some type. This is an XP Home system. I used Logon Studio to look in logonui.exe and it has the correct graphics in it for the original XP login screen.