WiX: How to override “C:\Program Files (x86)” on x64 machine in WixUI_Advanced sequence?

Question

I\'m using WixUI_Advanced sequence to allow users pick per-machine or per-user installation and change destination folder. My WiX project is i

Answer 1

Something like this would probably do the trick:

UPDATE: SetDirectory schedules the action prior to WixSetDefaultPerMachineFolder - code updated for manually scheduled elements to schedule between WixSetDefaultPerMachineFolder and WixSetPerMachineFolder. Tested OK with OP sample code under Win7 x64

UPDATE2: Added action to set ARPINSTALLOCATION as http://robmensching.com/blog/posts/2011/1/14/ARPINSTALLLOCATION-and-how-to-set-it-with-the-WiX-toolset