http://bugs.winehq.org/show_bug.cgi?id=18834
--- Comment #2 from Hans Leidekker hans@meelstraat.net 2009-06-08 08:36:24 --- Created an attachment (id=21645) --> (http://bugs.winehq.org/attachment.cgi?id=21645) msi: Set REINSTALL property when the product is already installed.
Try this patch.