What RegistryValue Root should be used in case of Single Package Authoring installation? - wix

Question

What RegistryValue Root should be used in case of Single Package Authoring installation?
This is a simple Single Package Authoring installation:
<?xml version='1.0' encoding='windows-1252'?>
<Wix xmlns='http://schemas.microsoft.com/wix/2006/wi'>
<Product Name='Foobar 1.0' Id='GUID' UpgradeCode='GUID'
Language='1033' Codepage='1252' Version='1.0.0' Manufacturer='Acme Ltd.'>
<Package Id='*' Keywords='Installer' Description="Acme's Foobar 1.0 Installer"
Comments='Foobar is a registered trademark of Acme Ltd.' Manufacturer='Acme Ltd.'
InstallerVersion='100' Languages='1033' Compressed='yes' SummaryCodepage='1252' />
<Property Id="ALLUSERS" Secure="yes" Value="2" />
<Property Id="MSIINSTALLPERUSER" Secure="yes" Value="1" />
<Property Id='ApplicationFolderName' Value="Acme" />
<Property Id='WixAppFolder' Value="WixPerUserFolder" />
<Media Id='1' Cabinet='Sample.cab' EmbedCab='yes' DiskPrompt="CD-ROM #1" />
<Property Id='DiskPrompt' Value="Acme's Foobar 1.0 Installation [1]" />
<Directory Id='TARGETDIR' Name='SourceDir'>
<Directory Id='ProgramFilesFolder' Name='PFiles'>
<Directory Id='Acme' Name='Acme'>
<Directory Id='INSTALLDIR' Name='Foobar 1.0'>
<Component Id='MainExecutable' Guid='GUID'>
<File Id='FoobarEXE' Name='FoobarAppl10.exe' DiskId='1' Source='FoobarAppl10.exe' KeyPath='yes'>
<Shortcut Id="startmenuFoobar10" Directory="ProgramMenuDir" Name="Foobar 1.0" WorkingDirectory='INSTALLDIR' Icon="Foobar10.exe" IconIndex="0" Advertise="yes" />
</File>
</Component>
</Directory>
</Directory>
</Directory>
<Directory Id="ProgramMenuFolder" Name="Programs">
<Directory Id="ProgramMenuDir" Name="Foobar 1.0">
<Component Id="ProgramMenuDir" Guid="GUID">
<RemoveFolder Id='ProgramMenuDir' On='uninstall' />
<RegistryValue Root='HKCU' Key='Software\[Manufacturer]\[ProductName]' Type='string' Value='' KeyPath='yes' />
</Component>
</Directory>
</Directory>
</Directory>
<Feature Id='Complete' Title='Foobar 1.0' Description='The complete package.'
Display='expand' Level='1' ConfigurableDirectory='INSTALLDIR'>
<Feature Id='MainProgram' Title='Program' Description='The main executable.' Level='1'>
<ComponentRef Id='MainExecutable' />
<ComponentRef Id='ProgramMenuDir' />
</Feature>
</Feature>
<Icon Id="Foobar10.exe" SourceFile="FoobarAppl10.exe" />
<UI Id="MyWixUI_Mondo">
<UIRef Id="WixUI_MySetup" />
</UI>
</Product>
</Wix>
During installation registry key 'Software[Manufacturer][ProductName]' will be created under HKCU root.
It is correct in case of per user installation.
But I am not sure that it is correct in case of per machine installation.
It is impossible to use HKLM instead of HKCU - wix will not compile such a file.
There is the error "ICE38: Component ProgramMenuDir installs to user profile. It's KeyPath registry key must fall under HKCU" during compilation.
Is it a problem?
Or should I use HKCU in case of per user and per machine installations if I use Single Package Authoring installation?

Answer 1

Windows Installer XML uses the root type "HKMU" to the MSI type "(none)" (-1). See: Registry Table
(none) - 0x001 -1 If this is a per-user installation, the registry
value is written under HKEY_CURRENT_USER. If this is a per-machine
installation, the registry value is written under HKEY_LOCAL_MACHINE.
Note that a per-machine installation is specified by setting the
ALLUSERS property to 1.