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Editorial Team
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Asked: 2026-06-07T14:00:00+00:00

I am developing an installer using Wix and need to kill a process (not

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I am developing an installer using Wix and need to kill a process (not application) silently during installation so the user doesn’t get a pop up asking to kill the process or wait and restart. I have seen solutions for killing an application but not a process.

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  1. Editorial Team

    After some digging around I found this solution which uses the WixUtilExtension Quiet Execution Custom Action http://wix.sourceforge.net/manual-wix3/qtexec.htm:

    <InstallExecuteSequence>
  <Custom Action='MyProcess.TaskKill' Before='InstallValidate'/>
</InstallExecuteSequence>

<Property Id="QtExecCmdLine" 
          Value='"[WindowsFolder]\System32\taskkill.exe" /F /IM MyProcess.exe'/>
<CustomAction Id="MyProcess.TaskKill" 
              BinaryKey="WixCA" 
              DllEntry="CAQuietExec" 
              Execute="immediate" 
              Return="ignore"/>

<Directory Id="TARGETDIR" Name="SourceDir">
  <Directory Id="WindowsFolder" Name="WINDOWS"/>
    ...
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