Windows Logon UI

[Sead0nkey]

Today my computer started to do something strange. I lock my desktop with the Win+"L" key combo. It goes to my welcome screen, then it goes to a blank blue screen with the Little "thinking" mouse icon. It will do that for about 10mins where I can not log on at all. Once it goes back to the welcome screen I get a Windows Logon UI warning! Anyone got an Idea?

Here is what the error message tells me :

Error signature
szAppName: logonui.exe szAppVer: 6.0.2800.1106 szModName: logonui.exe
szModVer: 6.0.2800.1106 offset: 000070c7

The following files will be included in this error report:
C:\DOCUME~1\BRADLE~1\LOCALS~1\Temp\WERC9.tmp.dir00\logonui.exe.mdmp
C:\DOCUME~1\BRADLE~1\LOCALS~1\Temp\WERC9.tmp.dir00\appcompat.txt

 

[LiLithTecH]

The LogonUI.exe file is more than likely corrupted.

Do a REPAIR with your XP CD and it should clear the problem.

The file APPCOMPAT.TXT should point you to the App that may have corrupted the file.

 

[Sead0nkey]

Going to try and let the cd repair, anything I should watch for?

 

[Smilin]

Try a couple other things first...

I'm assuming you can't login at all here so use safemode to do this:

Check HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Be sure UIHost exists and has a REG_EXPAND_SZ value of "logonui.exe"

Run "SFC /Scannow" to run the system file checker. It will fix logonui if it needs it, or just grab a copy off your XP CD and throw it into system32

A repair might be a bit of an overkill since it whacks all files in system32 and drivers. A chkdsk /f /r or Chkdsk /p (depending on version of your chkdsk) might be in order since this problem doesn't really happen "on it's own"