I am working on an oobe.xml file that gets copied to unattended.xml when installing Windows Vista x64, but it always stops with the error, "Windows could not parse or process unattend answer file [C:\Windows\Panther\unattend.xml] for pass [oobeSystem]. The answer file is invalid." After looking at "C:\Windows\Panther\UnattendGC\setuperr.log" for my error, it all seems to start from an invalid processorArchitecture. So, what should my processor architecture be? Right now I have it set to x64 - see below. setuperr.log 2011-05-09 18:39:24, Error [oobeldr.exe] SMI data results dump: Source = Name: Microsoft-Windows-Shell-Setup, Language: neutral 2011-05-09 18:39:24, Error [oobeldr.exe] SMI data results dump: Description = The processorArchitecture attribute has an has an invalid value. 2011-05-09 18:39:26, Error [oobeldr.exe] User input error was detected in unattend file. Error: [0x0] 2011-05-09 18:40:51, Error [windeploy.exe] Command [%windir%\system32\oobe\oobeldr.exe /system] failed with exit code [0x8022002a] 2011-05-09 18:40:51, Error [windeploy.exe] Failure occured during online installation. Online installation cannot complete at this time.; hr = 0x80004005 2011-05-09 18:42:06, Error [oobeldr.exe] Pass has failed status; system is in an invalid state. 2011-05-09 18:42:10, Error [oobeldr.exe] Failed to complete RunSMIPass for oobeSystem. Error: [0x8030000C] 2011-05-09 18:42:10, Error [oobeldr.exe] There was an error while processing oobeSystem. Error: [0x8030000C] 2011-05-09 18:42:17, Error [windeploy.exe] Command [%windir%\system32\oobe\oobeldr.exe /system] failed with exit code [0x8030000c] 2011-05-09 18:42:17, Error [windeploy.exe] Failure occured during online installation. Online installation cannot complete at this time.; hr = 0x80004005 2011-05-09 18:43:33, Error [oobeldr.exe] Pass has failed status; system is in an invalid state. 2011-05-09 18:43:37, Error [oobeldr.exe] Failed to complete RunSMIPass for oobeSystem. Error: [0x8030000C] 2011-05-09 18:43:37, Error [oobeldr.exe] There was an error while processing oobeSystem. Error: [0x8030000C] 2011-05-09 18:43:41, Error [windeploy.exe] Command [%windir%\system32\oobe\oobeldr.exe /system] failed with exit code [0x8030000c] 2011-05-09 18:43:41, Error [windeploy.exe] Failure occured during online installation. Online installation cannot complete at this time.; hr = 0x80004005 <?xml version="1.0" encoding="utf-8"?> <unattend xmlns="urn:schemas-microsoft-com:unattend"> <settings pass="oobeSystem"> <component name="Microsoft-Windows-Shell-Setup" processorArchitecture="x64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <OEMInformation> <Manufacturer>Toshiba</Manufacturer> <SupportURL>http://pcsupport.toshiba.com</SupportURL> <Logo>c:\Windows\System32\oobe\TOSHIBA_BADGE.BMP</Logo> <wallpaper> <path>c:\Windows\System32\oobe\msoobe.jpg</path> </wallpaper> </OEMInformation> </component> </settings> </unattend> I know I have an x64 disk. setupact.log confirms it - "2011-05-09 18:15:09, Info IBS InstallWindows:Setup architecture is [x64]"