Why are multiple MSIExec.exe processes running on my machine during an installation?

ranilele38
Posts: 1177
Joined: Wed Sep 07, 2016 4:41 pm

Why are multiple MSIExec.exe processes running on my machine during an installation?

Postby ranilele38 » Sat Oct 22, 2016 5:24 pm

Why are multiple MSIExec.exe processes running on my machine during an installation?

santosh
Posts: 1311
Joined: Wed Sep 07, 2016 4:43 pm

Re: Why are multiple MSIExec.exe processes running on my machine during an installation?

Postby santosh » Sat Oct 22, 2016 5:24 pm

A number of MSIExec processes can be running during an installation. The reason for this is that Windows Installer uses a client-server model for performing installations. Additionally for security reasons, Windows Installer hosts DLL and script custom actions in a "sandbox" process. Depending on how the install was initiated, one of the MSIExec processes can be the client process. Another MSIExec process is Windows Installer service. Any remaining MSIExec processes are usually sandbox processes for hosting custom actions. The determination as to which MSIExec process will serve as the sandbox process for a script or DLL custom action depends in part on whether the custom action will run elevated or impersonated and whether the custom action is 32-bit or 64-bit


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