Hi Jacob, I couldn't understand your "<Variable Persisted="Yes" Name=...," part (still firmly got my wix beginner hat on!), but in the end got it sorted by setting a registry key in the MSI on installation, and then getting burn to look for it in the event of an update..
<util:RegistrySearch Root="HKLM" Key="SOFTWARE\MyCompany" Value="ProductAInstalled" Variable="ProductAInstalled" Result="exists" /> <Chain> <MsiPackage SourceFile="..\SetupProductA\bin\Release\SetupProductA.msi" InstallCondition="chkProductA OR ProductAInstalled" /> <MsiPackage SourceFile="..\SetupProductB\bin\Release\SetupProductB.msi" InstallCondition="(chkProductB) OR (ProductBInstalled)" /> <MsiPackage SourceFile="..\SetupProductC\bin\Release\SetupProductC.msi" InstallCondition="(chkProductC) OR (ProductCInstalled)" /> </Chain> Thanks.. -- View this message in context: http://windows-installer-xml-wix-toolset.687559.n2.nabble.com/Conditionally-Installing-Update-MSI-s-in-Burn-tp7581445p7581472.html Sent from the wix-users mailing list archive at Nabble.com. ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct _______________________________________________ WiX-users mailing list WiX-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wix-users