You can't set an order for launch conditions. Many people use type 19 custom
actions instead. You can control the order in the sequence then.

<CustomAction Error="25003" Id="EnsurePrivileged" />

    <InstallExecuteSequence>
        <Custom Action="EnsurePrivileged" Before="AppSearch">not
Privileged</Custom>

I remember reading on this list that on some OSes, Privileged is always set
because you cant know whether the user is going to elevate or not when the
install execute sequence starts changing the system state.
http://windows-installer-xml-wix-toolset.687559.n2.nabble.com/Confusionm-arou
nd-Privileged-property-td5945582.html


-----Original Message-----
From: Ravi Raj [mailto:raviraj.callin...@gmail.com] 
Sent: 23 April 2012 12:39
To: General discussion for Windows Installer XML toolset.
Subject: [WiX-users] Prioritize Launch Conditions

I want to prioritize the launch conditions I am using.
I want that first installer checks OS then Admin privilege then  DotNet  and
then component search. I have created this file as below:

<?xml version="1.0" encoding="UTF-8"?>
<Wix xmlns="http://schemas.microsoft.com/wix/2006/wi";>
<Fragment>
    <Property Id="LaunchConditionsFile" Value="1" />

    <Condition Message="!(loc.ValidationAdministrator)">Installed OR
Privileged</Condition>

    <Condition Message="!(loc.ValidationOperatingSystem)">
      --condition for OS Check --
    </Condition>

    <Condition Message="!(loc.ValidationDotNetFramework)">
      --condition for .NET Check --
    </Condition>

    <PropertyRef Id="R2012" />
    <Condition Message="!(loc.ValidationR2012)">
     --condition for Component Search Check --
    </Condition>

</Fragment>
</Wix>

Now everytime i run the installer, the registry search condition launches
first. If I comment this statement then OS check validate comes in picture.
How can I overcome this issue?

--
Thanks and Regards,
Ravi Raj
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