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Editorial Team
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Asked: 2026-05-16T09:02:19+00:00

In Windows Install XML toolset, to install a service, we group <ServiceInstall> with a

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In Windows Install XML toolset, to install a service, we group <ServiceInstall> with a <File> in a <Component>. To conditionally install the service, we put <Condition> under the <Component>. However if the condition is false, the file will not be installed too. If I put the <File> in an unconditional <Component>, then the service has no executable file path and thus installation will fail. If I put the <File> in both <Component>, duplicate symbols will be found.

The question is, can we install a service conditionally, but install the associated executable file unconditionally?

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1 Answer

  1. Editorial Team

    Create two components with the different GUIDs’ and Ids’ and mutually exclusive conditions: one for the file and service, and another for file only. Something like this:

    <Component Id="SvcComp" Guid="{YOUR-GUID}" SharedDllRefCount="yes">
    <Condition> SOME_CONDITION </Condition>
    <File Id="SvcFile" Name="Service.exe" Source="Service.exe" Vital="yes" />
    <ServiceInstall Id="Svc" Name="Service" DisplayName="Service" Description="Service" Type="ownProcess" Start="auto" ErrorControl="normal" Vital="yes" />
    <ServiceControl Id="Svc" Name="Service" Stop="both" Remove="uninstall" Wait="yes" />
</Component>

<Component Id="ExeComp" Guid="{YYOUR-GUID}" SharedDllRefCount="yes" >
    <Condition> NOT SOME_CONDITION </Condition>
    <File Id="ExeFile" Name="Service.exe" Source="Service.exe" Vital="yes" />
</Component>

    You will get a LGHT1076 warning which could be suppressed since the conditions in the components are mutually exclusive.

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