I'm helping a friend. He is running xp pro and when we start the computer up this is the message we recieve - User interface failure. The logon user interface dll msgina.dll failed to load. Contact your system administrator to replace the DLL, or restore the original DLL. I found this at Microsoft.com http://support.microsoft.com/kb/836683/ and followed the instructions, but when we go to last known good configuration, we recieve the original message again. I've tried to boot in safe mode, and recieve the same message. I searched the forum and found similar cases, except that he does not have a recovery disc. He doesn't know whether the system restore was enabled. I have no idea what to try next. Any help on this would be greatly appreciated.