Using Microsoft Windows Installer log files

A Microsoft Windows Installer (MSI) log file is provided at the end of an installation or uninstallation process. This log is useful if an error occurred in the process or the installation was interrupted.

About this task

MSI files show error and success codes at the "MainEngineThread is returning" line. If the file includes "Remove = All", the log file resulted from an uninstallation process.


  1. To search through the log, search for " error " (without the quotes and including a space before and after the word).

    You can ignore lines such as the following containing the word "error" in the text:

    SchedSecureObjectsRollback: Failed to store ACL rollback information 
    with error 0x80070002 - continuing
  2. Note the text near the string " error ".