Another option is to find the path in registry, in the Installer key. You will 
need to know the following information:
* Product Code (or Upgrade Code and then find all products installed for it)
* How to convert GUID to "compressed" Microsoft's format, which is used in 
registry
* For which user it was installed - you will need SID of that user. If it was 
installed for all users, then the SID will be S-1-5-18, which is just Local 
System user.

The you will need to check LocalPackage value of the following key in registry:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\<<USER_SID_HERE>>\Products\<<COMPRESSED
 PRODUCT GUID>>\InstallProperties

For example, for Wix 3.6.3303.0, it is:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products\67D42AC9D02003944BAA562A28737DA1\InstallProperties

Hope that helps.


-----Original Message-----
From: Rob Hamflett [mailto:rob_hamfl...@sn.scee.net] 
Sent: Thursday, November 15, 2012 10:29
To: wix-users@lists.sourceforge.net
Subject: Re: [WiX-users] Where can I find the installer that was used.

Windows keeps a cached copy of the MSI in C:\Windows\Installer, if that's of 
any help.  You could scan through the MSI files in there and check the 
properties for the one you want.

Rob

On 14/11/2012 20:51, tyler.w.r...@accenture.com wrote:
> Hello all,
>
>          I am trying to write an application that will go through the file 
> table in an msi and make sure the files on the system are the same version 
> and location. Basically a regression test for our installers. I have 
> everything good except I have no idea how to find the installer that was used 
> to install the product. Basically we use WIX and support multi-instance and I 
> need to know if there is an easy way to find the installer that was used for 
> a specific instance. In the registry I can find the product in the Uninstall 
> area and the closest thing to the installer in there is a MsiExec.exe 
> /X{myguid}.
>
> Tyler Reid | Operations and Infrastructure | Accenture Software | P&C 
> Insurance
> 1807 Jones Street | Bolivar, MO 65613| USA
> Office: +cc.xxx.xxx.xxxx | Fax: 417.777.3792
> E-Mail: tyler.w.r...@accenture.com<mailto:tyler.w.r...@accenture.com> 
> | www.accenture.com/pcsoftware<http://www.accenture.com/pcsoftware>
>
>
>
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