If this per-machine system policy is set to 1 (one), all Patch Optimization options are turned off during the installation.
The patch optimization options and DisableFlyWeightPatching policy are available beginning with Windows Installer version 3.0.
Registry Key
HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Installer
Data Type
REG_DWORD
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Build date: 8/13/2009
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