Windows 10 Pro RTM (Build 10240) Autounattend.xml

 For x64:

<?xml version="1.0" encoding="utf-8"?>
<unattend xmlns="urn:schemas-microsoft-com:unattend">
    <settings pass="windowsPE">
        <component name="Microsoft-Windows-International-Core-WinPE" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" 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>en-us</InputLocale>
            <SystemLocale>en-us</SystemLocale>
            <UILanguage>en-us</UILanguage>
            <UILanguageFallback>en-us</UILanguageFallback>
            <UserLocale>en-us</UserLocale>
        </component>
        <component name="Microsoft-Windows-Setup" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
            <UserData>
                <ProductKey>
                    <Key>W269N-WFGWX-YVC9B-4J6C9-T83GX</Key>
                    <WillShowUI>Never</WillShowUI>
                </ProductKey>
            </UserData>
        </component>
    </settings>
</unattend>



For x86:

<?xml version="1.0" encoding="utf-8"?>
<unattend xmlns="urn:schemas-microsoft-com:unattend">
    <settings pass="windowsPE">
        <component name="Microsoft-Windows-International-Core-WinPE" processorArchitecture="x86" publicKeyToken="31bf3856ad364e35" 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>en-us</InputLocale>
            <SystemLocale>en-us</SystemLocale>
            <UILanguage>en-us</UILanguage>
            <UILanguageFallback>en-us</UILanguageFallback>
            <UserLocale>en-us</UserLocale>
        </component>
        <component name="Microsoft-Windows-Setup" processorArchitecture="x86" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
            <UserData>
                <ProductKey>
                    <Key>W269N-WFGWX-YVC9B-4J6C9-T83GX</Key>
                    <WillShowUI>Never</WillShowUI>
                </ProductKey>
            </UserData>
        </component>
    </settings>
</unattend>