My MS Office 2010 documents show up like this in Explorer:

They open fine, but I'd like to get the icon corrected.
- I have run a repair from Add/Remove programs.
- I have cleared the icon cache using the script provided in update 2 of this superuser answer.
- I have fixed the MS Office file associations from the command prompt using
C:\Program Files\Microsoft Office\Office14\winword.exe /r - I have checked the following registry key for a valid path to an icon
HKEY_CLASSES_ROOT\Word.Document.12\DefaultIcon- Icon listed is a REG_SZ entry titled
(Default)with the valueC:\Windows\Installer\{90140000-0012-0000-1000-0000000FF1CE}\wordicon.exe,13 - The icon file specified in this registry entry exists within the listed directory
- Icon listed is a REG_SZ entry titled
We have several systems around the office that are missing the file associations to MS Office. If I have not specified an "Open With" target for office documents on a particular system and I use the winword.exe /r command, the icons correct themselves upon next login. If I have already specified a target application, the icons stay the same.
How do I change these back?