http://bugs.winehq.org/show_bug.cgi?id=33258
--- Comment #11 from Rosanne DiMesio dimesio@earthlink.net 2013-03-23 08:06:09 CDT --- You should not need any overrides at all to run the Office installer. The override for riched20 needed for Powerpoint is set after installing. I don't know about the Visio installer, however. if the Visio installer needs overrides, they may well interfere with the Office installer, but that interference would not be a Wine bug. What would be a Wine bug would be the need for overrides to install Visio in the first place.
So the question is, can you install Visio to a clean wineprefix without any overrides or other tweaks? If the answer is yes, please retest the combination without any overrides set.