I have noticed a strange behavior for all of my installers when run on Windows 7 platforms.
My installers are created as Basic MSI projects and after successfully uninstalling the applications, I consistently see that the parent folder created under the [ProgramsFilesFolder] does not get removed. The folders are managed by components that use the [INSTALLDIR] property (no custom actions involved).
There are no handles open on the folders during the uninstall process and they are completely empty (no hidden files remain).
I only see this behavior on Windows 7 systems; on XP and Vista systems the folders are always removed.
we have similar issues even for windows 2008 and 2003 OS servers, we found an alternative to write a vb script function and define it in custom action, call it before install or after uninstall
