JSI Tip 5703. How do I manage Windows Installer local policies by using the registry?

You can manage Windows Installer behavior by using Group Policy and Active Directory.

Alternately, you can manage some user and/or computer Windows Installer local policies by using the registry.

You can manage the following user policies at HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Installer

  Value Name     Data Type     Data Value Description  
  AlwaysInstallElevated     REG_DWORD     See tip 3292 » Allow users to always install with System privileges.  
  SearchOrder     REG_SZ      The search order for the 3 source types (network, media (CD-ROM or DVD), and URL). A data value of nmu would cause the installer to search network source, then media source, and finally URL sources. If you omit a letter, that source is NOT searched. If the Value Name is NOT present, the default order is nmu.  
  TransformsAtSource     REG_DWORD     A 1 causes the installer to search for transform files in the root of any network source. By default, transforms are stored in the Application Data folder of a user's profile.   
  DisableRollback     REG_DWORD     A 1 disables installation rollback, which is enabled by default.  

You can manage the following computer policies at HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Installer:

  Value Name     Data Type     Data Value Description  
  AlwaysInstallElevated     REG_DWORD     See tip 3292 » Allow users to always install with System privileges.  
  DisableMSI     REG_DWORD     A 0, or a missing Value Name, enables the installer. A 1 disables the installer for non-managed applications. A 2 disables the installer for all applications.  
  Logging     REG_SZ      This policy is only used if logging is enabled by the /L command-line option or MsiEnableLog. Set the data value to the same string of characters as used by /L, but + and * are not allowed. The log is created as %TEMP%\MSI<random>.LOG.  
  DisablePatch     REG_DWORD     A 1 prevents installer from applying patches.  

NOTE: See How do I troubleshoot Windows Installer problems on Windows 2000 and Windows NT 4.0?

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