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Title
How does InstallScript project determine when to run in maintenance

Summary

How does InstallScript project determine when to run in maintenance

Synopsis

When running an InstallScript installer, a log file is being searched for to determine whether maintenance mode is trigger. If the file is missing, the install will perform a first timer install.

Discussion

When an Installscript installer starts, it looks for a reference to a valid LogFile value in the uninstall key in the 32bit location:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{Product Code}

By default, this location is at:
C:\Program Files (x86)\InstallShield Installation Information\{Product Code}\setup.ilg
InstallShield Installation Information folder will be hidden.

If the file is found, the Install will run in maintenance mode.

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How does InstallScript project determine when to run in maintenance