This problem first showed up two weeks ago while making an assignment for school. Because of the lack of newer software there, I needed to save it in the Office 97-2003 .doc format.
I noticed that the icon was incorrect, as it should be the standard Microsoft Office 2003 'logo' (*) and not a blank sheet with Office's 2007 icon (**) on it.
* (The icon that should be displayed for an Office 97-2003 file in Explorer etc.)
** (The icon I get when seeing it through Explorer.)
Several reinstallations of Office 2007 did not bring joy, same for the update to Windows 7 Home Premium (x86).
The odd thing is; I have memories of me working on Vista (I change my OS quite a lot for testing and debug purposes) with Office 2007 and saving files in the Office 97-2003 extension with the right icon and file description displayed. The file is named "DOC-File" rather than "Word 97-2003 Text file" while the file saved in the Office 2007 format is named correctly, I made a screenshot depicting this. The documents are exactly the same in content (just some random typing) and were saved as both .docx and .doc.
I've tried just about everything; ranging from editing register-keys to changing the default applications for that filetype. I've associated Word with all Office text files and they all display their correct icon except for the 97-2003 files.
Please, read this post thoroughly and don't troll with advice on things I have already tried or done.