Sorry to resurrect this post, but I am having a similar issue and can't find a solution. The deployed Windows 7 32-bit image is UK time/date/region, all looks fine but the short date format is set to US, this is a problem with some software we use called Ingres, it picks up the short date as a parameter and errors if incorrect format is used. Within the registry it is set to region 409 (US) within "HKCU\Control Panel\International\locale=00000409" UK details are in our unattend as follows, please check for any mistakes: <?xml version="1.0" encoding="utf-8"?> <unattend xmlns="urn:schemas-microsoft-com:unattend"> <settings pass="oobeSystem"> <component name="Microsoft-Windows-International-Core" processorArchitecture="x86" publicKeyToken="31bf3856ad364exx" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <SetupUILanguage> <UILanguage>en-US</UILanguage> </SetupUILanguage> <InputLocale>0809:00000809</InputLocale> <SystemLocale>en-GB</SystemLocale> <UILanguage>en-GB</UILanguage> <UserLocale>en-GB</UserLocale> </component> </settings> <cpi:offlineImage cpi:source="wim://work/osd/ref/win7capture.wim#1" xmlns:cpi="urn:schemas-microsoft-com:cpi" /> </unattend> I'm not sure if <UILanguage>en-US</UILanguage> should or can be changed to <UILanguage>en-GB</UILanguage>, I've read quite a bit and some people have problems changing that option. We are deploying via SCCM and using a WIM file. If any help can be shed on this I will be grateful. Thanks