Windows 7: Logonui.exe

Hello,

I installed windows 7 a few days ago.
And suddenly i couldnt connect my xbox360 extender.
so i checked my event viewer and found this error when i connect.

Faulting application name: LogonUI.exe, version: 6.1.7077.0, time stamp: 0x49d7ee77
Faulting module name: ntdll.dll, version: 6.1.7077.0, time stamp: 0x49d80218
Exception code: 0xc0000005
Fault offset: 0x0006876f
Faulting process id: 0xea8
Faulting application start time: 0x01c9ca3b739161c1
Faulting application path: C:\Windows\system32\LogonUI.exe
Faulting module path: C:\Windows\SYSTEM32\ntdll.dll
Report Id: b1477703-362e-11de-bbe8-000d56da2e19

Is it possible to upload the logonui.exe (found in system32) file ?
because i lost my cd.
Maybe i can replaice it and my problem will be solved.

Thanks in advance

How did you install? Upgrade or clean?

Clean install..
i guess i just need the file
i think its corrupted

thanks for reply

Might be an idea to reinstall the extender with your anti virus temporarily turned off.

i reinstalled it many times , i dont even have a anti virus running.